Use absl::make_unique and absl::WrapUnique directly

Instead of going through our wrappers in ptr_util.h.

This CL was generated by the following script:

  git grep -l ptr_util | xargs perl -pi -e 's,#include "rtc_base/ptr_util.h",#include "absl/memory/memory.h",'
  git grep -l MakeUnique | xargs perl -pi -e 's,\b(rtc::)?MakeUnique\b,absl::make_unique,g'
  git grep -l WrapUnique | xargs perl -pi -e 's,\b(rtc::)?WrapUnique\b,absl::WrapUnique,g'
  git checkout -- rtc_base/ptr_util{.h,_unittest.cc}
  git cl format

Followed by manually adding dependencies on
//third_party/abseil-cpp/absl/memory until `gn check` stopped
complaining.

Bug: webrtc:9473
Change-Id: I89ccd363f070479b8c431eb2c3d404a46eaacc1c
Reviewed-on: https://webrtc-review.googlesource.com/86600
Commit-Queue: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23850}
diff --git a/examples/androidnativeapi/jni/androidcallclient.cc b/examples/androidnativeapi/jni/androidcallclient.cc
index f2cdbd0..3b19629 100644
--- a/examples/androidnativeapi/jni/androidcallclient.cc
+++ b/examples/androidnativeapi/jni/androidcallclient.cc
@@ -12,6 +12,7 @@
 
 #include <utility>
 
+#include "absl/memory/memory.h"
 #include "api/audio_codecs/builtin_audio_decoder_factory.h"
 #include "api/audio_codecs/builtin_audio_encoder_factory.h"
 #include "api/peerconnectioninterface.h"
@@ -20,7 +21,6 @@
 #include "media/engine/internalencoderfactory.h"
 #include "media/engine/webrtcmediaengine.h"
 #include "modules/audio_processing/include/audio_processing.h"
-#include "rtc_base/ptr_util.h"
 #include "sdk/android/native_api/jni/java_types.h"
 #include "sdk/android/native_api/video/wrapper.h"
 
@@ -75,7 +75,7 @@
 }  // namespace
 
 AndroidCallClient::AndroidCallClient()
-    : call_started_(false), pc_observer_(rtc::MakeUnique<PCObserver>(this)) {
+    : call_started_(false), pc_observer_(absl::make_unique<PCObserver>(this)) {
   thread_checker_.DetachFromThread();
   CreatePeerConnectionFactory();
 }
@@ -155,8 +155,8 @@
       cricket::WebRtcMediaEngineFactory::Create(
           nullptr /* adm */, webrtc::CreateBuiltinAudioEncoderFactory(),
           webrtc::CreateBuiltinAudioDecoderFactory(),
-          rtc::MakeUnique<webrtc::InternalEncoderFactory>(),
-          rtc::MakeUnique<webrtc::InternalDecoderFactory>(),
+          absl::make_unique<webrtc::InternalEncoderFactory>(),
+          absl::make_unique<webrtc::InternalDecoderFactory>(),
           nullptr /* audio_mixer */, webrtc::AudioProcessingBuilder().Create());
   RTC_LOG(LS_INFO) << "Media engine created: " << media_engine.get();