Revert of FrameBuffer for the new jitter buffer. (patchset #9 id:160001 of https://codereview.webrtc.org/1969403007/ )

Reason for revert:
Two tests added by this CL failed in Win DrMemory Full:
 TestFrameBuffer2.OneLayerStreamReordered - TestFrameBuffer2.WaitForFrame

See the link here:
https://build.chromium.org/p/client.webrtc/waterfall?builder=Win%20DrMemory%20Full

Original issue's description:
> FrameBuffer for the new jitter buffer.
>
> BUG=webrtc:5514
> R=danilchap@webrtc.org, mflodman@webrtc.org
>
> Committed: https://crrev.com/a376e70cf9d0df3c35d53533b454da542661775b
> Cr-Commit-Position: refs/heads/master@{#12798}

TBR=mflodman@webrtc.org,danilchap@webrtc.org,philipel@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5514

Review-Url: https://codereview.webrtc.org/1991513004
Cr-Commit-Position: refs/heads/master@{#12800}
diff --git a/webrtc/modules/modules.gyp b/webrtc/modules/modules.gyp
index e11bbfe..145f4c0 100644
--- a/webrtc/modules/modules.gyp
+++ b/webrtc/modules/modules.gyp
@@ -362,7 +362,6 @@
             'video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc',
             'video_coding/codecs/vp8/simulcast_unittest.cc',
             'video_coding/codecs/vp8/simulcast_unittest.h',
-            'video_coding/frame_buffer2_unittest.cc',
             'video_coding/include/mock/mock_vcm_callbacks.h',
             'video_coding/decoding_state_unittest.cc',
             'video_coding/histogram_unittest.cc',
diff --git a/webrtc/modules/video_coding/BUILD.gn b/webrtc/modules/video_coding/BUILD.gn
index 755e6ef..7c6c9ed 100644
--- a/webrtc/modules/video_coding/BUILD.gn
+++ b/webrtc/modules/video_coding/BUILD.gn
@@ -21,8 +21,6 @@
     "fec_tables_xor.h",
     "frame_buffer.cc",
     "frame_buffer.h",
-    "frame_buffer2.cc",
-    "frame_buffer2.h",
     "frame_object.cc",
     "frame_object.h",
     "generic_decoder.cc",
diff --git a/webrtc/modules/video_coding/frame_buffer2.cc b/webrtc/modules/video_coding/frame_buffer2.cc
deleted file mode 100644
index c6a1a06..0000000
--- a/webrtc/modules/video_coding/frame_buffer2.cc
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/modules/video_coding/frame_buffer2.h"
-
-#include <algorithm>
-
-#include "webrtc/base/checks.h"
-#include "webrtc/modules/video_coding/frame_object.h"
-#include "webrtc/modules/video_coding/jitter_estimator.h"
-#include "webrtc/modules/video_coding/sequence_number_util.h"
-#include "webrtc/modules/video_coding/timing.h"
-#include "webrtc/system_wrappers/include/clock.h"
-
-namespace webrtc {
-namespace video_coding {
-
-namespace {
-// The maximum age of decoded frames tracked by frame buffer, compared to
-// |newest_picture_id_|.
-constexpr int kMaxFrameAge = 4096;
-
-// The maximum number of decoded frames being tracked by the frame buffer.
-constexpr int kMaxNumHistoryFrames = 256;
-}  // namespace
-
-bool FrameBuffer::FrameComp::operator()(const FrameKey& f1,
-                                        const FrameKey& f2) const {
-  // first = picture id
-  // second = spatial layer
-  if (f1.first == f2.first)
-    return f1.second < f2.second;
-  return AheadOf(f2.first, f1.first);
-}
-
-FrameBuffer::FrameBuffer(Clock* clock,
-                         VCMJitterEstimator* jitter_estimator,
-                         const VCMTiming* timing)
-    : clock_(clock),
-      frame_inserted_event_(false, false),
-      jitter_estimator_(jitter_estimator),
-      timing_(timing),
-      newest_picture_id_(-1) {}
-
-std::unique_ptr<FrameObject> FrameBuffer::NextFrame(int64_t max_wait_time_ms) {
-  int64_t latest_return_time = clock_->TimeInMilliseconds() + max_wait_time_ms;
-  while (true) {
-    int64_t now = clock_->TimeInMilliseconds();
-    int64_t wait_ms = max_wait_time_ms;
-
-    crit_.Enter();
-    frame_inserted_event_.Reset();
-    auto next_frame = frames_.end();
-    for (auto frame_it = frames_.begin(); frame_it != frames_.end();
-         ++frame_it) {
-      const FrameObject& frame = *frame_it->second;
-      if (IsContinuous(frame)) {
-        next_frame = frame_it;
-        int64_t render_time = timing_->RenderTimeMs(frame.timestamp, now);
-        wait_ms = timing_->MaxWaitingTime(render_time, now);
-
-        // This will cause the frame buffer to prefer high framerate rather
-        // than high resolution in the case of the decoder not decoding fast
-        // enough and the stream has multiple spatial and temporal layers.
-        if (wait_ms == 0)
-          continue;
-
-        break;
-      }
-    }
-    crit_.Leave();
-
-    // If the timout occures, return. Otherwise a new frame has been inserted
-    // and the best frame to decode next will be selected again.
-    wait_ms = std::min<int64_t>(wait_ms, latest_return_time - now);
-    wait_ms = std::max<int64_t>(wait_ms, 0);
-    if (!frame_inserted_event_.Wait(wait_ms)) {
-      crit_.Enter();
-      if (next_frame != frames_.end()) {
-        // TODO(philipel): update jitter estimator with correct values.
-        jitter_estimator_->UpdateEstimate(100, 100);
-
-        decoded_frames_.insert(next_frame->first);
-        std::unique_ptr<FrameObject> frame = std::move(next_frame->second);
-        frames_.erase(frames_.begin(), ++next_frame);
-        crit_.Leave();
-        return frame;
-      } else {
-        crit_.Leave();
-        return std::unique_ptr<FrameObject>();
-      }
-    }
-  }
-}
-
-void FrameBuffer::InsertFrame(std::unique_ptr<FrameObject> frame) {
-  rtc::CritScope lock(&crit_);
-  if (newest_picture_id_ == -1)
-    newest_picture_id_ = frame->picture_id;
-
-  if (AheadOf<uint16_t>(frame->picture_id, newest_picture_id_))
-    newest_picture_id_ = frame->picture_id;
-
-  // Remove frames as long as we have too many, |kMaxNumHistoryFrames|.
-  while (decoded_frames_.size() > kMaxNumHistoryFrames)
-    decoded_frames_.erase(decoded_frames_.begin());
-
-  // Remove frames that are too old, |kMaxNumHistoryFrames|.
-  uint16_t old_picture_id = Subtract<1 << 16>(newest_picture_id_, kMaxFrameAge);
-  auto old_decoded_it =
-      decoded_frames_.lower_bound(FrameKey(old_picture_id, 0));
-  decoded_frames_.erase(decoded_frames_.begin(), old_decoded_it);
-
-  FrameKey key(frame->picture_id, frame->spatial_layer);
-  frames_[key] = std::move(frame);
-  frame_inserted_event_.Set();
-}
-
-bool FrameBuffer::IsContinuous(const FrameObject& frame) const {
-  // If a frame with an earlier picture id was inserted compared to the last
-  // decoded frames picture id then that frame arrived too late.
-  if (!decoded_frames_.empty() &&
-      AheadOf(decoded_frames_.rbegin()->first, frame.picture_id)) {
-    return false;
-  }
-
-  // Have we decoded all frames that this frame depend on?
-  for (size_t r = 0; r < frame.num_references; ++r) {
-    FrameKey ref_key(frame.references[r], frame.spatial_layer);
-    if (decoded_frames_.find(ref_key) == decoded_frames_.end())
-      return false;
-  }
-
-  // If this is a layer frame, have we decoded the lower layer of this
-  // super frame.
-  if (frame.inter_layer_predicted) {
-    RTC_DCHECK_GT(frame.spatial_layer, 0);
-    FrameKey ref_key(frame.picture_id, frame.spatial_layer - 1);
-    if (decoded_frames_.find(ref_key) == decoded_frames_.end())
-      return false;
-  }
-
-  return true;
-}
-
-}  // namespace video_coding
-}  // namespace webrtc
diff --git a/webrtc/modules/video_coding/frame_buffer2.h b/webrtc/modules/video_coding/frame_buffer2.h
deleted file mode 100644
index 10cae42..0000000
--- a/webrtc/modules/video_coding/frame_buffer2.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_MODULES_VIDEO_CODING_FRAME_BUFFER2_H_
-#define WEBRTC_MODULES_VIDEO_CODING_FRAME_BUFFER2_H_
-
-#include <array>
-#include <map>
-#include <memory>
-#include <set>
-#include <utility>
-
-#include "webrtc/base/constructormagic.h"
-#include "webrtc/base/criticalsection.h"
-#include "webrtc/base/event.h"
-#include "webrtc/base/thread_annotations.h"
-
-namespace webrtc {
-
-class Clock;
-class VCMJitterEstimator;
-class VCMTiming;
-
-namespace video_coding {
-
-class FrameObject;
-
-class FrameBuffer {
- public:
-  FrameBuffer(Clock* clock,
-              VCMJitterEstimator* jitter_estimator,
-              const VCMTiming* timing);
-
-  // Insert a frame into the frame buffer.
-  void InsertFrame(std::unique_ptr<FrameObject> frame);
-
-  // Get the next frame for decoding. Will return at latest after
-  // |max_wait_time_ms|, with either a managed FrameObject or an empty
-  // unique ptr if there is no available frame for decoding.
-  std::unique_ptr<FrameObject> NextFrame(int64_t max_wait_time_ms);
-
- private:
-  // FrameKey is a pair of (picture id, spatial layer).
-  using FrameKey = std::pair<uint16_t, uint8_t>;
-
-  // Comparator used to sort frames, first on their picture id, and second
-  // on their spatial layer.
-  struct FrameComp {
-    bool operator()(const FrameKey& f1, const FrameKey& f2) const;
-  };
-
-  // Determines whether a frame is continuous.
-  bool IsContinuous(const FrameObject& frame) const
-      EXCLUSIVE_LOCKS_REQUIRED(crit_);
-
-  // Keep track of decoded frames.
-  std::set<FrameKey, FrameComp> decoded_frames_ GUARDED_BY(crit_);
-
-  // The actual buffer that holds the FrameObjects.
-  std::map<FrameKey, std::unique_ptr<FrameObject>, FrameComp> frames_
-      GUARDED_BY(crit_);
-
-  rtc::CriticalSection crit_;
-  Clock* const clock_;
-  rtc::Event frame_inserted_event_;
-  VCMJitterEstimator* const jitter_estimator_;
-  const VCMTiming* const timing_;
-  int newest_picture_id_ GUARDED_BY(crit_);
-
-  RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(FrameBuffer);
-};
-
-}  // namespace video_coding
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_VIDEO_CODING_FRAME_BUFFER2_H_
diff --git a/webrtc/modules/video_coding/frame_buffer2_unittest.cc b/webrtc/modules/video_coding/frame_buffer2_unittest.cc
deleted file mode 100644
index 67706ce..0000000
--- a/webrtc/modules/video_coding/frame_buffer2_unittest.cc
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/modules/video_coding/frame_buffer2.h"
-
-#include <algorithm>
-#include <cstring>
-#include <limits>
-#include <vector>
-
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "webrtc/base/platform_thread.h"
-#include "webrtc/base/random.h"
-#include "webrtc/modules/video_coding/frame_object.h"
-#include "webrtc/modules/video_coding/jitter_estimator.h"
-#include "webrtc/modules/video_coding/sequence_number_util.h"
-#include "webrtc/modules/video_coding/timing.h"
-#include "webrtc/system_wrappers/include/clock.h"
-
-namespace webrtc {
-namespace video_coding {
-
-class VCMTimingFake : public VCMTiming {
- public:
-  explicit VCMTimingFake(Clock* clock) : VCMTiming(clock) {}
-
-  int64_t RenderTimeMs(uint32_t frame_timestamp,
-                       int64_t now_ms) const override {
-    if (last_ms_ == -1) {
-      last_ms_ = now_ms + kDelayMs;
-      last_timestamp_ = frame_timestamp;
-    }
-
-    uint32_t diff = MinDiff(frame_timestamp, last_timestamp_);
-    if (AheadOf(frame_timestamp, last_timestamp_))
-      last_ms_ += diff / 90;
-    else
-      last_ms_ -= diff / 90;
-
-    last_timestamp_ = frame_timestamp;
-    return last_ms_;
-  }
-
-  uint32_t MaxWaitingTime(int64_t render_time_ms,
-                          int64_t now_ms) const override {
-    return std::max<int>(0, render_time_ms - now_ms - kDecodeTime);
-  }
-
- private:
-  static constexpr int kDelayMs = 50;
-  static constexpr int kDecodeTime = kDelayMs / 2;
-  mutable uint32_t last_timestamp_ = 0;
-  mutable int64_t last_ms_ = -1;
-};
-
-class VCMJitterEstimatorMock : public VCMJitterEstimator {
- public:
-  explicit VCMJitterEstimatorMock(Clock* clock) : VCMJitterEstimator(clock) {}
-
-  MOCK_METHOD1(UpdateRtt, void(int64_t rttMs));
-  MOCK_METHOD3(UpdateEstimate,
-               void(int64_t frameDelayMs,
-                    uint32_t frameSizeBytes,
-                    bool incompleteFrame));
-};
-
-class FrameObjectMock : public FrameObject {
- public:
-  MOCK_CONST_METHOD1(GetBitstream, bool(uint8_t* destination));
-};
-
-class TestFrameBuffer2 : public ::testing::Test {
- protected:
-  static constexpr int kMaxReferences = 5;
-  static constexpr int kFps1 = 1000;
-  static constexpr int kFps10 = kFps1 / 10;
-  static constexpr int kFps20 = kFps1 / 20;
-
-  TestFrameBuffer2()
-      : clock_(0),
-        timing_(&clock_),
-        jitter_estimator_(&clock_),
-        buffer_(&clock_, &jitter_estimator_, &timing_),
-        rand_(0x34678213),
-        tear_down_(false),
-        extract_thread_(&ExtractLoop, this, "Extract Thread"),
-        trigger_extract_event_(false, false),
-        crit_acquired_event_(false, false) {}
-
-  void SetUp() override { extract_thread_.Start(); }
-
-  void TearDown() override {
-    tear_down_ = true;
-    trigger_extract_event_.Set();
-    extract_thread_.Stop();
-  }
-
-  template <typename... T>
-  void InsertFrame(uint16_t picture_id,
-                   uint8_t spatial_layer,
-                   int64_t ts_ms,
-                   bool inter_layer_predicted,
-                   T... refs) {
-    static_assert(sizeof...(refs) <= kMaxReferences,
-                  "To many references specified for FrameObject.");
-    std::array<uint16_t, sizeof...(refs)> references = {{refs...}};
-
-    std::unique_ptr<FrameObjectMock> frame(new FrameObjectMock());
-    frame->picture_id = picture_id;
-    frame->spatial_layer = spatial_layer;
-    frame->timestamp = ts_ms * 90;
-    frame->num_references = references.size();
-    frame->inter_layer_predicted = inter_layer_predicted;
-    for (size_t r = 0; r < references.size(); ++r)
-      frame->references[r] = references[r];
-
-    buffer_.InsertFrame(std::move(frame));
-  }
-
-  void ExtractFrame(int64_t max_wait_time = 0) {
-    crit_.Enter();
-    if (max_wait_time == 0) {
-      frames_.emplace_back(buffer_.NextFrame(0));
-      crit_.Leave();
-    } else {
-      max_wait_time_ = max_wait_time;
-      trigger_extract_event_.Set();
-      crit_.Leave();
-      // Make sure |crit_| is aquired by |extract_thread_| before returning.
-      crit_acquired_event_.Wait(rtc::Event::kForever);
-    }
-  }
-
-  void CheckFrame(size_t index, int picture_id, int spatial_layer) {
-    rtc::CritScope lock(&crit_);
-    ASSERT_LT(index, frames_.size());
-    ASSERT_TRUE(frames_[index]);
-    ASSERT_EQ(picture_id, frames_[index]->picture_id);
-    ASSERT_EQ(spatial_layer, frames_[index]->spatial_layer);
-  }
-
-  void CheckNoFrame(size_t index) {
-    rtc::CritScope lock(&crit_);
-    ASSERT_LT(index, frames_.size());
-    ASSERT_FALSE(frames_[index]);
-  }
-
-  static bool ExtractLoop(void* obj) {
-    TestFrameBuffer2* tfb = static_cast<TestFrameBuffer2*>(obj);
-    while (true) {
-      tfb->trigger_extract_event_.Wait(rtc::Event::kForever);
-      {
-        rtc::CritScope lock(&tfb->crit_);
-        tfb->crit_acquired_event_.Set();
-        if (tfb->tear_down_)
-          return false;
-
-        tfb->frames_.emplace_back(tfb->buffer_.NextFrame(tfb->max_wait_time_));
-      }
-    }
-  }
-
-  uint32_t Rand() { return rand_.Rand<uint32_t>(); }
-
-  SimulatedClock clock_;
-  VCMTimingFake timing_;
-  VCMJitterEstimatorMock jitter_estimator_;
-  FrameBuffer buffer_;
-  std::vector<std::unique_ptr<FrameObject>> frames_;
-  Random rand_;
-
-  int64_t max_wait_time_;
-  bool tear_down_;
-  rtc::PlatformThread extract_thread_;
-  rtc::Event trigger_extract_event_;
-  rtc::Event crit_acquired_event_;
-  rtc::CriticalSection crit_;
-};
-
-TEST_F(TestFrameBuffer2, ExtractFromEmptyBuffer) {
-  ExtractFrame();
-  CheckNoFrame(0);
-}
-
-TEST_F(TestFrameBuffer2, WaitForFrame) {
-  uint16_t pid = Rand();
-  uint32_t ts = Rand();
-
-  ExtractFrame(20);
-  InsertFrame(pid, 0, ts, false);
-  CheckFrame(0, pid, 0);
-}
-
-TEST_F(TestFrameBuffer2, OneSuperFrame) {
-  uint16_t pid = Rand();
-  uint32_t ts = Rand();
-
-  ExtractFrame(20);
-  InsertFrame(pid, 1, ts, true);
-  InsertFrame(pid, 0, ts, false);
-  ExtractFrame();
-
-  CheckFrame(0, pid, 0);
-  CheckFrame(1, pid, 1);
-}
-
-TEST_F(TestFrameBuffer2, OneLayerStream) {
-  uint16_t pid = Rand();
-  uint32_t ts = Rand();
-
-  InsertFrame(pid, 0, ts, false);
-  ExtractFrame();
-  CheckFrame(0, pid, 0);
-  for (int i = 1; i < 10; ++i) {
-    InsertFrame(pid + i, 0, ts + i * kFps10, false, pid + i - 1);
-    ExtractFrame();
-    clock_.AdvanceTimeMilliseconds(kFps10);
-    CheckFrame(i, pid + i, 0);
-  }
-}
-
-TEST_F(TestFrameBuffer2, OneLayerStreamReordered) {
-  uint16_t pid = Rand();
-  uint32_t ts = Rand();
-
-  InsertFrame(pid, 0, ts, false);
-  ExtractFrame();
-  CheckFrame(0, pid, 0);
-  for (int i = 1; i < 10; i += 2) {
-    ExtractFrame(15);
-    InsertFrame(pid + i + 1, 0, ts + (i + 1) * kFps10, false, pid + i);
-    clock_.AdvanceTimeMilliseconds(kFps10);
-    InsertFrame(pid + i, 0, ts + i * kFps10, false, pid + i - 1);
-    clock_.AdvanceTimeMilliseconds(kFps10);
-    ExtractFrame();
-    CheckFrame(i, pid + i, 0);
-    CheckFrame(i + 1, pid + i + 1, 0);
-  }
-}
-
-TEST_F(TestFrameBuffer2, DropTemporalLayerSlowDecoder) {
-  uint16_t pid = Rand();
-  uint32_t ts = Rand();
-
-  InsertFrame(pid, 0, ts, false);
-  InsertFrame(pid + 1, 0, ts + kFps20, false);
-  for (int i = 2; i < 10; i += 2) {
-    uint32_t ts_tl0 = ts + i / 2 * kFps10;
-    InsertFrame(pid + i, 0, ts_tl0, false, pid + i - 2);
-    InsertFrame(pid + i + 1, 0, ts_tl0 + kFps20, false, pid + i, pid + i - 1);
-  }
-
-  for (int i = 0; i < 10; ++i) {
-    ExtractFrame();
-    clock_.AdvanceTimeMilliseconds(60);
-  }
-
-  CheckFrame(0, pid, 0);
-  CheckFrame(1, pid + 1, 0);
-  CheckFrame(2, pid + 2, 0);
-  CheckFrame(3, pid + 4, 0);
-  CheckFrame(4, pid + 6, 0);
-  CheckFrame(5, pid + 8, 0);
-  CheckNoFrame(6);
-  CheckNoFrame(7);
-  CheckNoFrame(8);
-  CheckNoFrame(9);
-}
-
-TEST_F(TestFrameBuffer2, DropSpatialLayerSlowDecoder) {
-  uint16_t pid = Rand();
-  uint32_t ts = Rand();
-
-  InsertFrame(pid, 0, ts, false);
-  InsertFrame(pid, 1, ts, false);
-  for (int i = 1; i < 6; ++i) {
-    uint32_t ts_tl0 = ts + i * kFps10;
-    InsertFrame(pid + i, 0, ts_tl0, false, pid + i - 1);
-    InsertFrame(pid + i, 1, ts_tl0, false, pid + i - 1);
-  }
-
-  ExtractFrame();
-  ExtractFrame();
-  clock_.AdvanceTimeMilliseconds(55);
-  for (int i = 2; i < 12; ++i) {
-    ExtractFrame();
-    clock_.AdvanceTimeMilliseconds(55);
-  }
-
-  CheckFrame(0, pid, 0);
-  CheckFrame(1, pid, 1);
-  CheckFrame(2, pid + 1, 0);
-  CheckFrame(3, pid + 1, 1);
-  CheckFrame(4, pid + 2, 0);
-  CheckFrame(5, pid + 2, 1);
-  CheckFrame(6, pid + 3, 0);
-  CheckFrame(7, pid + 4, 0);
-  CheckFrame(8, pid + 5, 0);
-  CheckNoFrame(9);
-  CheckNoFrame(10);
-  CheckNoFrame(11);
-}
-
-TEST_F(TestFrameBuffer2, InsertLateFrame) {
-  uint16_t pid = Rand();
-  uint32_t ts = Rand();
-
-  InsertFrame(pid, 0, ts, false);
-  ExtractFrame();
-  InsertFrame(pid + 2, 0, ts, false);
-  ExtractFrame();
-  InsertFrame(pid + 1, 0, ts, false, pid);
-  ExtractFrame();
-
-  CheckFrame(0, pid, 0);
-  CheckFrame(1, pid + 2, 0);
-  CheckNoFrame(2);
-}
-
-}  // namespace video_coding
-}  // namespace webrtc
diff --git a/webrtc/modules/video_coding/frame_object.cc b/webrtc/modules/video_coding/frame_object.cc
index 7b9ec0d..1634f89 100644
--- a/webrtc/modules/video_coding/frame_object.cc
+++ b/webrtc/modules/video_coding/frame_object.cc
@@ -18,7 +18,6 @@
 FrameObject::FrameObject()
     : picture_id(0),
       spatial_layer(0),
-      timestamp(0),
       num_references(0),
       inter_layer_predicted(false) {}
 
diff --git a/webrtc/modules/video_coding/frame_object.h b/webrtc/modules/video_coding/frame_object.h
index e8bb481..80ab0ec 100644
--- a/webrtc/modules/video_coding/frame_object.h
+++ b/webrtc/modules/video_coding/frame_object.h
@@ -31,7 +31,6 @@
   // have to be constructed from the header data relevant to that codec.
   uint16_t picture_id;
   uint8_t spatial_layer;
-  uint32_t timestamp;
 
   size_t num_references;
   uint16_t references[kMaxFrameReferences];
diff --git a/webrtc/modules/video_coding/timing.h b/webrtc/modules/video_coding/timing.h
index e593c9a..a45eee3 100644
--- a/webrtc/modules/video_coding/timing.h
+++ b/webrtc/modules/video_coding/timing.h
@@ -28,7 +28,7 @@
   // The primary timing component should be passed
   // if this is the dual timing component.
   explicit VCMTiming(Clock* clock, VCMTiming* master_timing = NULL);
-  virtual ~VCMTiming();
+  ~VCMTiming();
 
   // Resets the timing to the initial state.
   void Reset();
@@ -69,11 +69,11 @@
   // Returns the receiver system time when the frame with timestamp
   // frame_timestamp should be rendered, assuming that the system time currently
   // is now_ms.
-  virtual int64_t RenderTimeMs(uint32_t frame_timestamp, int64_t now_ms) const;
+  int64_t RenderTimeMs(uint32_t frame_timestamp, int64_t now_ms) const;
 
   // Returns the maximum time in ms that we can wait for a frame to become
   // complete before we must pass it to the decoder.
-  virtual uint32_t MaxWaitingTime(int64_t render_time_ms, int64_t now_ms) const;
+  uint32_t MaxWaitingTime(int64_t render_time_ms, int64_t now_ms) const;
 
   // Returns the current target delay which is required delay + decode time +
   // render delay.
diff --git a/webrtc/modules/video_coding/video_coding.gypi b/webrtc/modules/video_coding/video_coding.gypi
index 27454a4..8d31a6a 100644
--- a/webrtc/modules/video_coding/video_coding.gypi
+++ b/webrtc/modules/video_coding/video_coding.gypi
@@ -32,7 +32,6 @@
         'encoded_frame.h',
         'fec_tables_xor.h',
         'frame_buffer.h',
-        'frame_buffer2.h',
         'frame_object.h',
         'rtp_frame_reference_finder.h',
         'generic_decoder.h',
@@ -63,7 +62,6 @@
         'decoding_state.cc',
         'encoded_frame.cc',
         'frame_buffer.cc',
-        'frame_buffer2.cc',
         'frame_object.cc',
         'rtp_frame_reference_finder.cc',
         'generic_decoder.cc',