Convert MediaLog from being ref counted to owned by WebMediaPlayer.

content/renderer/media_capture_from_element/html_audio_element_capturer_source_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media_capture_from_element/html_audio_element_capturer_source.h"
 #include "base/memory/weak_ptr.h"
 #include "base/run_loop.h"
 #include "base/test/scoped_task_environment.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/public/renderer/media_stream_audio_sink.h"
@@ skipping 51 matching lines @@
 //  connect to in order to operate correctly. This class has an inner content
 //  MediaStreamAudioTrack.
 // - finally, a MockMediaStreamAudioSink to observe captured audio frames, and
 //  that plugs into the former MediaStreamAudioTrack.
 class HTMLAudioElementCapturerSourceTest : public testing::Test {
  public:
   HTMLAudioElementCapturerSourceTest()
       : fake_callback_(0.1, kAudioTrackSampleRate),
         audio_source_(new media::WebAudioSourceProviderImpl(
             new media::NullAudioSink(base::ThreadTaskRunnerHandle::Get()),
-            new media::MediaLog())) {}
+            &media_log_)) {}
 
   void SetUp() final {
     const media::AudioParameters params(
         media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
         media::GuessChannelLayout(kNumChannelsForTest),
         kAudioTrackSampleRate /* sample_rate */, 16 /* bits_per_sample */,
         kAudioTrackSamplesPerBuffer /* frames_per_buffer */);
     audio_source_->Initialize(params, &fake_callback_);
 
     blink_audio_source_.Initialize(blink::WebString::FromUTF8("audio_id"),
@@ skipping 27 matching lines @@
   int InjectAudio(media::AudioBus* audio_bus) {
     return audio_source_->RenderForTesting(audio_bus);
   }
 
  protected:
   const base::test::ScopedTaskEnvironment scoped_task_environment_;
 
   blink::WebMediaStreamSource blink_audio_source_;
   blink::WebMediaStreamTrack blink_audio_track_;
 
+  media::MediaLog media_log_;
   media::FakeAudioRenderCallback fake_callback_;
   scoped_refptr<media::WebAudioSourceProviderImpl> audio_source_;
 };
 
 // Constructs and destructs all objects. This is a non trivial sequence.
 TEST_F(HTMLAudioElementCapturerSourceTest, ConstructAndDestruct) {
 }
 
 // This test verifies that Audio can be properly captured when injected in the
 // WebAudioSourceProviderImpl.
@@ skipping 18 matching lines @@
   std::unique_ptr<media::AudioBus> bus = media::AudioBus::Create(
       kNumChannelsForTest, kAudioTrackSamplesPerBuffer);
   InjectAudio(bus.get());
   run_loop.Run();
 
   track()->Stop();
   track()->RemoveSink(&sink);
 }
 
 }  // namespace content