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/call/call_perf_tests.cc b/call/call_perf_tests.cc
index 1a9b5e5..5bdc6c1 100644
--- a/call/call_perf_tests.cc
+++ b/call/call_perf_tests.cc
@@ -13,7 +13,6 @@
 #include <memory>
 #include <string>
 
-#include "absl/memory/memory.h"
 #include "api/audio_codecs/builtin_audio_encoder_factory.h"
 #include "api/rtc_event_log/rtc_event_log.h"
 #include "api/test/simulated_network.h"
@@ -217,28 +216,28 @@
                    return pair.second == MediaType::VIDEO;
                  });
 
-    audio_send_transport = absl::make_unique<test::PacketTransport>(
+    audio_send_transport = std::make_unique<test::PacketTransport>(
         &task_queue_, sender_call_.get(), &observer,
         test::PacketTransport::kSender, audio_pt_map,
-        absl::make_unique<FakeNetworkPipe>(
+        std::make_unique<FakeNetworkPipe>(
             Clock::GetRealTimeClock(),
-            absl::make_unique<SimulatedNetwork>(audio_net_config)));
+            std::make_unique<SimulatedNetwork>(audio_net_config)));
     audio_send_transport->SetReceiver(receiver_call_->Receiver());
 
-    video_send_transport = absl::make_unique<test::PacketTransport>(
+    video_send_transport = std::make_unique<test::PacketTransport>(
         &task_queue_, sender_call_.get(), &observer,
         test::PacketTransport::kSender, video_pt_map,
-        absl::make_unique<FakeNetworkPipe>(
-            Clock::GetRealTimeClock(), absl::make_unique<SimulatedNetwork>(
-                                           BuiltInNetworkBehaviorConfig())));
+        std::make_unique<FakeNetworkPipe>(Clock::GetRealTimeClock(),
+                                          std::make_unique<SimulatedNetwork>(
+                                              BuiltInNetworkBehaviorConfig())));
     video_send_transport->SetReceiver(receiver_call_->Receiver());
 
-    receive_transport = absl::make_unique<test::PacketTransport>(
+    receive_transport = std::make_unique<test::PacketTransport>(
         &task_queue_, receiver_call_.get(), &observer,
         test::PacketTransport::kReceiver, payload_type_map_,
-        absl::make_unique<FakeNetworkPipe>(
-            Clock::GetRealTimeClock(), absl::make_unique<SimulatedNetwork>(
-                                           BuiltInNetworkBehaviorConfig())));
+        std::make_unique<FakeNetworkPipe>(Clock::GetRealTimeClock(),
+                                          std::make_unique<SimulatedNetwork>(
+                                              BuiltInNetworkBehaviorConfig())));
     receive_transport->SetReceiver(sender_call_->Receiver());
 
     CreateSendConfig(1, 0, 0, video_send_transport.get());
@@ -283,7 +282,7 @@
     }
     EXPECT_EQ(1u, video_receive_streams_.size());
     observer.set_receive_stream(video_receive_streams_[0]);
-    drifting_clock = absl::make_unique<DriftingClock>(clock_, video_ntp_speed);
+    drifting_clock = std::make_unique<DriftingClock>(clock_, video_ntp_speed);
     CreateFrameGeneratorCapturerWithDrift(drifting_clock.get(), video_rtp_speed,
                                           kDefaultFramerate, kDefaultWidth,
                                           kDefaultHeight);
@@ -383,9 +382,9 @@
       return new test::PacketTransport(
           task_queue, sender_call, this, test::PacketTransport::kSender,
           payload_type_map_,
-          absl::make_unique<FakeNetworkPipe>(
+          std::make_unique<FakeNetworkPipe>(
               Clock::GetRealTimeClock(),
-              absl::make_unique<SimulatedNetwork>(net_config_)));
+              std::make_unique<SimulatedNetwork>(net_config_)));
     }
 
     test::PacketTransport* CreateReceiveTransport(
@@ -394,9 +393,9 @@
       return new test::PacketTransport(
           task_queue, nullptr, this, test::PacketTransport::kReceiver,
           payload_type_map_,
-          absl::make_unique<FakeNetworkPipe>(
+          std::make_unique<FakeNetworkPipe>(
               Clock::GetRealTimeClock(),
-              absl::make_unique<SimulatedNetwork>(net_config_)));
+              std::make_unique<SimulatedNetwork>(net_config_)));
     }
 
     void OnFrame(const VideoFrame& video_frame) override {
@@ -890,26 +889,26 @@
         test::DEPRECATED_SingleThreadedTaskQueueForTesting* task_queue,
         Call* sender_call) override {
       auto network =
-          absl::make_unique<SimulatedNetwork>(GetFakeNetworkPipeConfig());
+          std::make_unique<SimulatedNetwork>(GetFakeNetworkPipeConfig());
       send_simulated_network_ = network.get();
       return new test::PacketTransport(
           task_queue, sender_call, this, test::PacketTransport::kSender,
           test::CallTest::payload_type_map_,
-          absl::make_unique<FakeNetworkPipe>(Clock::GetRealTimeClock(),
-                                             std::move(network)));
+          std::make_unique<FakeNetworkPipe>(Clock::GetRealTimeClock(),
+                                            std::move(network)));
     }
 
     test::PacketTransport* CreateReceiveTransport(
         test::DEPRECATED_SingleThreadedTaskQueueForTesting* task_queue)
         override {
       auto network =
-          absl::make_unique<SimulatedNetwork>(GetFakeNetworkPipeConfig());
+          std::make_unique<SimulatedNetwork>(GetFakeNetworkPipeConfig());
       receive_simulated_network_ = network.get();
       return new test::PacketTransport(
           task_queue, nullptr, this, test::PacketTransport::kReceiver,
           test::CallTest::payload_type_map_,
-          absl::make_unique<FakeNetworkPipe>(Clock::GetRealTimeClock(),
-                                             std::move(network)));
+          std::make_unique<FakeNetworkPipe>(Clock::GetRealTimeClock(),
+                                            std::move(network)));
     }
 
     void PerformTest() override {