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/pc/rtp_sender_receiver_unittest.cc b/pc/rtp_sender_receiver_unittest.cc
index 02d7452..9026cfc 100644
--- a/pc/rtp_sender_receiver_unittest.cc
+++ b/pc/rtp_sender_receiver_unittest.cc
@@ -109,7 +109,7 @@
         // test RtpSenders/RtpReceivers.
         media_engine_(new cricket::FakeMediaEngine()),
         channel_manager_(absl::WrapUnique(media_engine_),
-                         absl::make_unique<cricket::RtpDataEngine>(),
+                         std::make_unique<cricket::RtpDataEngine>(),
                          worker_thread_,
                          network_thread_),
         fake_call_(),
@@ -117,7 +117,7 @@
     // Create channels to be used by the RtpSenders and RtpReceivers.
     channel_manager_.Init();
     bool srtp_required = true;
-    rtp_dtls_transport_ = absl::make_unique<cricket::FakeDtlsTransport>(
+    rtp_dtls_transport_ = std::make_unique<cricket::FakeDtlsTransport>(
         "fake_dtls_transport", cricket::ICE_CANDIDATE_COMPONENT_RTP);
     rtp_transport_ = CreateDtlsSrtpTransport();
 
@@ -163,7 +163,7 @@
   }
 
   std::unique_ptr<webrtc::RtpTransportInternal> CreateDtlsSrtpTransport() {
-    auto dtls_srtp_transport = absl::make_unique<webrtc::DtlsSrtpTransport>(
+    auto dtls_srtp_transport = std::make_unique<webrtc::DtlsSrtpTransport>(
         /*rtcp_mux_required=*/true);
     dtls_srtp_transport->SetDtlsTransports(rtp_dtls_transport_.get(),
                                            /*rtcp_dtls_transport=*/nullptr);
@@ -196,7 +196,7 @@
     audio_track_ = AudioTrack::Create(kAudioTrackId, source);
     EXPECT_TRUE(local_stream_->AddTrack(audio_track_));
     std::unique_ptr<MockSetStreamsObserver> set_streams_observer =
-        absl::make_unique<MockSetStreamsObserver>();
+        std::make_unique<MockSetStreamsObserver>();
     audio_rtp_sender_ =
         AudioRtpSender::Create(worker_thread_, audio_track_->id(), nullptr,
                                set_streams_observer.get());
@@ -261,7 +261,7 @@
   void CreateVideoRtpSender(bool is_screencast, uint32_t ssrc = kVideoSsrc) {
     AddVideoTrack(is_screencast);
     std::unique_ptr<MockSetStreamsObserver> set_streams_observer =
-        absl::make_unique<MockSetStreamsObserver>();
+        std::make_unique<MockSetStreamsObserver>();
     video_rtp_sender_ = VideoRtpSender::Create(
         worker_thread_, video_track_->id(), set_streams_observer.get());
     ASSERT_TRUE(video_rtp_sender_->SetTrack(video_track_));
@@ -855,7 +855,7 @@
   EXPECT_TRUE(local_stream_->AddTrack(audio_track_));
 
   std::unique_ptr<MockSetStreamsObserver> set_streams_observer =
-      absl::make_unique<MockSetStreamsObserver>();
+      std::make_unique<MockSetStreamsObserver>();
   audio_rtp_sender_ = AudioRtpSender::Create(
       worker_thread_, audio_track_->id(), nullptr, set_streams_observer.get());
   ASSERT_TRUE(audio_rtp_sender_->SetTrack(audio_track_));
@@ -1086,7 +1086,7 @@
   AddVideoTrack(false);
 
   std::unique_ptr<MockSetStreamsObserver> set_streams_observer =
-      absl::make_unique<MockSetStreamsObserver>();
+      std::make_unique<MockSetStreamsObserver>();
   video_rtp_sender_ = VideoRtpSender::Create(worker_thread_, video_track_->id(),
                                              set_streams_observer.get());
   ASSERT_TRUE(video_rtp_sender_->SetTrack(video_track_));
@@ -1127,7 +1127,7 @@
   AddVideoTrack(false);
 
   std::unique_ptr<MockSetStreamsObserver> set_streams_observer =
-      absl::make_unique<MockSetStreamsObserver>();
+      std::make_unique<MockSetStreamsObserver>();
   video_rtp_sender_ = VideoRtpSender::Create(worker_thread_, video_track_->id(),
                                              set_streams_observer.get());
   ASSERT_TRUE(video_rtp_sender_->SetTrack(video_track_));
@@ -1555,7 +1555,7 @@
        PropagatesVideoTrackContentHintSetBeforeEnabling) {
   AddVideoTrack();
   std::unique_ptr<MockSetStreamsObserver> set_streams_observer =
-      absl::make_unique<MockSetStreamsObserver>();
+      std::make_unique<MockSetStreamsObserver>();
   // Setting detailed overrides the default non-screencast mode. This should be
   // applied even if the track is set on construction.
   video_track_->set_content_hint(VideoTrackInterface::ContentHint::kDetailed);