Ensures that audio tasks cannot run after AudioManager is deleted.

content/browser/renderer_host/media/audio_input_renderer_host_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/browser/renderer_host/media/audio_input_renderer_host.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 298 matching lines @@
             },
             base::Unretained(&id)));
     base::RunLoop().RunUntilIdle();
     return id;
   }
 
   media::FakeAudioLogFactory log_factory_;
   StrictMock<MockControllerFactory> controller_factory_;
   std::unique_ptr<MediaStreamManager> media_stream_manager_;
   TestBrowserThreadBundle thread_bundle_;
-  media::ScopedAudioManagerPtr audio_manager_;
+  std::unique_ptr<media::AudioManager> audio_manager_;
   std::unique_ptr<media::AudioSystem> audio_system_;
   StrictMock<MockRenderer> renderer_;
   scoped_refptr<AudioInputRendererHost> airh_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AudioInputRendererHostTest);
 };
 
 // Checks that a controller is created and a reply is sent when creating a
 // stream.
@@ skipping 228 matching lines @@
   EXPECT_CALL(controller_factory_, ControllerCreated());
 
   airh_->OnMessageReceived(AudioInputHostMsg_CreateStream(
       kStreamId, kRenderFrameId, session_id, DefaultConfig()));
   base::RunLoop().RunUntilIdle();
 
   EXPECT_CALL(*controller_factory_.controller(0), Close(_));
 }
 
 }  // namespace content