Reland of Make the new jitter buffer the default jitter buffer. (patchset #1 id:1 of https://codereview.webrtc.org/2638423003/ )

Reason for revert:
Bugfixes related to the new jitter buffer has landed.

Original issue's description:
> Revert of Make the new jitter buffer the default jitter buffer. (patchset #2 id:230001 of https://codereview.webrtc.org/2642753002/ )
>
> Reason for revert:
> Breaks tests downstream.
>
> Original issue's description:
> > Reland of Make the new jitter buffer the default jitter buffer. (patchset #1 id:1 of https://codereview.chromium.org/2632123005/ )
> >
> > Reason for revert:
> > Fix in this CL: https://codereview.chromium.org/2640793003/
> >
> > Original issue's description:
> > > Revert of Make the new jitter buffer the default jitter buffer. (patchset #7 id:120001 of https://codereview.chromium.org/2627463004/ )
> > >
> > > Reason for revert:
> > > Breaks android bots.
> > >
> > > Original issue's description:
> > > > Make the new jitter buffer the default jitter buffer.
> > > >
> > > > This CL contains only the changes necessary to make the switch to the new jitter
> > > > buffer, clean up will be done in follow up CLs.
> > > >
> > > > In this CL:
> > > >  - Removed the WebRTC-NewVideoJitterBuffer experiment and made the
> > > >    new video jitter buffer the default one.
> > > >  - Moved WebRTC.Video.KeyFramesReceivedInPermille and
> > > >    WebRTC.Video.JitterBufferDelayInMs to the ReceiveStatisticsProxy.
> > > >
> > > > BUG=webrtc:5514
> > > >
> > > > Review-Url: https://codereview.webrtc.org/2627463004
> > > > Cr-Commit-Position: refs/heads/master@{#16114}
> > > > Committed: https://chromium.googlesource.com/external/webrtc/+/0f0763d86d5d4e7f27e8dece02560e39c6da97d6
> > >
> > > TBR=stefan@webrtc.org,terelius@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/2632123005
> > > Cr-Commit-Position: refs/heads/master@{#16117}
> > > Committed: https://chromium.googlesource.com/external/webrtc/+/c08c191f7d206dc0de945185370d18f29d556931
> >
> > TBR=stefan@webrtc.org,terelius@webrtc.org
> > # Not skipping CQ checks because original CL landed more than 1 days ago.
> > BUG=webrtc:5514
> >
> > Review-Url: https://codereview.webrtc.org/2642753002
> > Cr-Commit-Position: refs/heads/master@{#16149}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/f20dd0014d1cfc8a2e859a9e177e7fe2b21274ca
>
> TBR=stefan@webrtc.org,terelius@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/2638423003
> Cr-Commit-Position: refs/heads/master@{#16159}
> Committed: https://chromium.googlesource.com/external/webrtc/+/04926b82641c426d764aa6e013e133db519129db

TBR=stefan@webrtc.org,terelius@webrtc.org,kjellander@webrtc.org,kjellander@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:5514

Review-Url: https://codereview.webrtc.org/2652043005
Cr-Commit-Position: refs/heads/master@{#16293}
diff --git a/webrtc/modules/video_coding/frame_buffer2.cc b/webrtc/modules/video_coding/frame_buffer2.cc
index 0831c0c..2a7e85e 100644
--- a/webrtc/modules/video_coding/frame_buffer2.cc
+++ b/webrtc/modules/video_coding/frame_buffer2.cc
@@ -16,6 +16,7 @@
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
+#include "webrtc/modules/video_coding/include/video_coding_defines.h"
 #include "webrtc/modules/video_coding/jitter_estimator.h"
 #include "webrtc/modules/video_coding/timing.h"
 #include "webrtc/system_wrappers/include/clock.h"
@@ -34,7 +35,8 @@
 
 FrameBuffer::FrameBuffer(Clock* clock,
                          VCMJitterEstimator* jitter_estimator,
-                         VCMTiming* timing)
+                         VCMTiming* timing,
+                         VCMReceiveStatisticsCallback* stats_callback)
     : clock_(clock),
       new_countinuous_frame_event_(false, false),
       jitter_estimator_(jitter_estimator),
@@ -45,11 +47,10 @@
       num_frames_history_(0),
       num_frames_buffered_(0),
       stopped_(false),
-      protection_mode_(kProtectionNack) {}
+      protection_mode_(kProtectionNack),
+      stats_callback_(stats_callback) {}
 
-FrameBuffer::~FrameBuffer() {
-  UpdateHistograms();
-}
+FrameBuffer::~FrameBuffer() {}
 
 FrameBuffer::ReturnReason FrameBuffer::NextFrame(
     int64_t max_wait_time_ms,
@@ -165,9 +166,8 @@
   rtc::CritScope lock(&crit_);
   RTC_DCHECK(frame);
 
-  ++num_total_frames_;
-  if (frame->num_references == 0)
-    ++num_key_frames_;
+  if (stats_callback_)
+    stats_callback_->OnCompleteFrame(frame->num_references == 0, frame->size());
 
   FrameKey key(frame->picture_id, frame->spatial_layer);
   int last_continuous_picture_id =
@@ -381,28 +381,22 @@
 }
 
 void FrameBuffer::UpdateJitterDelay() {
-  int unused;
-  int delay;
-  timing_->GetTimings(&unused, &unused, &unused, &unused, &delay, &unused,
-                      &unused);
+  if (!stats_callback_)
+    return;
 
-  accumulated_delay_ += delay;
-  ++accumulated_delay_samples_;
-}
-
-void FrameBuffer::UpdateHistograms() const {
-  rtc::CritScope lock(&crit_);
-  if (num_total_frames_ > 0) {
-    int key_frames_permille = (static_cast<float>(num_key_frames_) * 1000.0f /
-                                   static_cast<float>(num_total_frames_) +
-                               0.5f);
-    RTC_HISTOGRAM_COUNTS_1000("WebRTC.Video.KeyFramesReceivedInPermille",
-                              key_frames_permille);
-  }
-
-  if (accumulated_delay_samples_ > 0) {
-    RTC_HISTOGRAM_COUNTS_10000("WebRTC.Video.JitterBufferDelayInMs",
-                               accumulated_delay_ / accumulated_delay_samples_);
+  int decode_ms;
+  int max_decode_ms;
+  int current_delay_ms;
+  int target_delay_ms;
+  int jitter_buffer_ms;
+  int min_playout_delay_ms;
+  int render_delay_ms;
+  if (timing_->GetTimings(&decode_ms, &max_decode_ms, &current_delay_ms,
+                          &target_delay_ms, &jitter_buffer_ms,
+                          &min_playout_delay_ms, &render_delay_ms)) {
+    stats_callback_->OnFrameBufferTimingsUpdated(
+        decode_ms, max_decode_ms, current_delay_ms, target_delay_ms,
+        jitter_buffer_ms, min_playout_delay_ms, render_delay_ms);
   }
 }