Convert MediaLog from being ref counted to owned by WebMediaPlayer.

content/renderer/media/webmediaplayer_ms_unittest.cc

 // Copyright 2015 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 <stddef.h>
 
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "content/public/renderer/media_stream_renderer_factory.h"
 #include "content/renderer/media/webmediaplayer_ms.h"
@@ skipping 385 matching lines @@
       public blink::WebMediaPlayerClient,
       public cc::VideoFrameProvider::Client {
  public:
   WebMediaPlayerMSTest()
       : render_factory_(new MockRenderFactory(message_loop_.task_runner(),
                                               &message_loop_controller_)),
         player_(new WebMediaPlayerMS(
             nullptr,
             this,
             &delegate_,
-            new media::MediaLog(),
+            base::MakeUnique<media::MediaLog>(),
             std::unique_ptr<MediaStreamRendererFactory>(render_factory_),
             message_loop_.task_runner(),
             message_loop_.task_runner(),
             message_loop_.task_runner(),
             message_loop_.task_runner(),
             nullptr,
             blink::WebString(),
             blink::WebSecurityOrigin())),
         web_layer_set_(false),
         rendering_(false),
@@ skipping 552 matching lines @@
   // OnShown() should restart after a forced suspension.
   player_->OnFrameShown();
   EXPECT_FALSE(player_->Paused());
   EXPECT_CALL(*this, DoSetWebLayer(false));
 
   base::RunLoop().RunUntilIdle();
 }
 #endif
 
 }  // namespace content