Use std::make_unique instead of absl::make_unique.

WebRTC is now using C++14 so there is no need to use the Abseil version
of std::make_unique.

This CL has been created with the following steps:

git grep -l absl::make_unique | sort | uniq > /tmp/make_unique.txt
git grep -l absl::WrapUnique | sort | uniq > /tmp/wrap_unique.txt
git grep -l "#include <memory>" | sort | uniq > /tmp/memory.txt

diff --new-line-format="" --unchanged-line-format="" \
  /tmp/make_unique.txt /tmp/wrap_unique.txt | sort | \
  uniq > /tmp/only_make_unique.txt
diff --new-line-format="" --unchanged-line-format="" \
  /tmp/only_make_unique.txt /tmp/memory.txt | \
  xargs grep -l "absl/memory" > /tmp/add-memory.txt

git grep -l "\babsl::make_unique\b" | \
  xargs sed -i "s/\babsl::make_unique\b/std::make_unique/g"

git checkout PRESUBMIT.py abseil-in-webrtc.md

cat /tmp/add-memory.txt | \
  xargs sed -i \
  's/#include "absl\/memory\/memory.h"/#include <memory>/g'
git cl format
# Manual fix order of the new inserted #include <memory>

cat /tmp/only_make_unique | xargs grep -l "#include <memory>" | \
  xargs sed -i '/#include "absl\/memory\/memory.h"/d'

git ls-files | grep BUILD.gn | \
  xargs sed -i '/\/\/third_party\/abseil-cpp\/absl\/memory/d'

python tools_webrtc/gn_check_autofix.py \
  -m tryserver.webrtc -b linux_rel

# Repead the gn_check_autofix step for other platforms

git ls-files | grep BUILD.gn | \
  xargs sed -i 's/absl\/memory:memory/absl\/memory/g'
git cl format

Bug: webrtc:10945
Change-Id: I3fe28ea80f4dd3ba3cf28effd151d5e1f19aff89
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153221
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29209}
diff --git a/sdk/objc/api/peerconnection/RTCFileLogger.mm b/sdk/objc/api/peerconnection/RTCFileLogger.mm
index ef13023..2532fcf 100644
--- a/sdk/objc/api/peerconnection/RTCFileLogger.mm
+++ b/sdk/objc/api/peerconnection/RTCFileLogger.mm
@@ -132,11 +132,11 @@
   std::unique_ptr<rtc::FileRotatingStreamReader> stream;
   switch(_rotationType) {
     case RTCFileLoggerTypeApp:
-      stream = absl::make_unique<rtc::FileRotatingStreamReader>(_dirPath.UTF8String,
-                                                                kRTCFileLoggerRotatingLogPrefix);
+      stream = std::make_unique<rtc::FileRotatingStreamReader>(_dirPath.UTF8String,
+                                                               kRTCFileLoggerRotatingLogPrefix);
       break;
     case RTCFileLoggerTypeCall:
-      stream = absl::make_unique<rtc::CallSessionFileRotatingStreamReader>(_dirPath.UTF8String);
+      stream = std::make_unique<rtc::CallSessionFileRotatingStreamReader>(_dirPath.UTF8String);
       break;
   }
   size_t bufferSize = stream->GetSize();
diff --git a/sdk/objc/api/peerconnection/RTCPeerConnection.mm b/sdk/objc/api/peerconnection/RTCPeerConnection.mm
index 097eeb4..32a8a4b 100644
--- a/sdk/objc/api/peerconnection/RTCPeerConnection.mm
+++ b/sdk/objc/api/peerconnection/RTCPeerConnection.mm
@@ -236,11 +236,11 @@
 void PeerConnectionDelegateAdapter::OnIceSelectedCandidatePairChanged(
     const cricket::CandidatePairChangeEvent &event) {
   const auto &selected_pair = event.selected_candidate_pair;
-  auto local_candidate_wrapper = absl::make_unique<JsepIceCandidate>(
+  auto local_candidate_wrapper = std::make_unique<JsepIceCandidate>(
       selected_pair.local_candidate().transport_name(), -1, selected_pair.local_candidate());
   RTCIceCandidate *local_candidate =
       [[RTCIceCandidate alloc] initWithNativeCandidate:local_candidate_wrapper.release()];
-  auto remote_candidate_wrapper = absl::make_unique<JsepIceCandidate>(
+  auto remote_candidate_wrapper = std::make_unique<JsepIceCandidate>(
       selected_pair.remote_candidate().transport_name(), -1, selected_pair.remote_candidate());
   RTCIceCandidate *remote_candidate =
       [[RTCIceCandidate alloc] initWithNativeCandidate:remote_candidate_wrapper.release()];
@@ -563,7 +563,7 @@
                                                  rtc::saturated_cast<size_t>(maxSizeInBytes);
 
   _hasStartedRtcEventLog = _peerConnection->StartRtcEventLog(
-      absl::make_unique<webrtc::RtcEventLogOutputFile>(f, max_size));
+      std::make_unique<webrtc::RtcEventLogOutputFile>(f, max_size));
   return _hasStartedRtcEventLog;
 }
 
diff --git a/sdk/objc/api/peerconnection/RTCPeerConnectionFactory.mm b/sdk/objc/api/peerconnection/RTCPeerConnectionFactory.mm
index d63c08e..4ac33d2 100644
--- a/sdk/objc/api/peerconnection/RTCPeerConnectionFactory.mm
+++ b/sdk/objc/api/peerconnection/RTCPeerConnectionFactory.mm
@@ -8,6 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include <memory>
+
 #import "RTCPeerConnectionFactory+Native.h"
 #import "RTCPeerConnectionFactory+Private.h"
 #import "RTCPeerConnectionFactoryOptions+Private.h"
@@ -28,7 +30,6 @@
 #import "components/video_codec/RTCVideoEncoderFactoryH264.h"
 // The no-media version PeerConnectionFactory doesn't depend on these files, but the gn check tool
 // is not smart enough to take the #ifdef into account.
-#include "absl/memory/memory.h"
 #include "api/audio_codecs/builtin_audio_decoder_factory.h"     // nogncheck
 #include "api/audio_codecs/builtin_audio_encoder_factory.h"     // nogncheck
 #include "api/rtc_event_log/rtc_event_log_factory.h"
@@ -51,7 +52,6 @@
 // C++ target.
 // TODO(zhihuang): Remove nogncheck once MediaEngineInterface is moved to C++
 // API layer.
-#include "absl/memory/memory.h"
 #include "api/transport/media/media_transport_interface.h"
 #include "media/engine/webrtc_media_engine.h"  // nogncheck
 
@@ -231,7 +231,7 @@
     dependencies.media_engine = cricket::CreateMediaEngine(std::move(media_deps));
     dependencies.call_factory = webrtc::CreateCallFactory();
     dependencies.event_log_factory =
-        absl::make_unique<webrtc::RtcEventLogFactory>(dependencies.task_queue_factory.get());
+        std::make_unique<webrtc::RtcEventLogFactory>(dependencies.task_queue_factory.get());
     dependencies.network_controller_factory = std::move(networkControllerFactory);
     dependencies.media_transport_factory = std::move(mediaTransportFactory);
 #endif