Revert of Pass task runners to AudioManager constructor.

media/mojo/services/mojo_media_client.h

 // Copyright 2014 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.
 
 #ifndef MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_
 #define MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_
 
 #include <memory>
 
 #include "media/base/audio_decoder.h"
@@ skipping 14 matching lines @@
 }
 
 namespace media {
 
 class MojoMediaClient {
  public:
   virtual ~MojoMediaClient();
 
   // Called exactly once before any other method.
   virtual void Initialize();
-  // Called before the host application is scheduled to quit.
-  // The application message loop is still valid at this point, so all clean
-  // up tasks requiring the message loop must be completed before returning.
-  virtual void WillQuit();
 
   virtual std::unique_ptr<AudioDecoder> CreateAudioDecoder(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
   // TODO(xhwang): Consider creating Renderer and CDM directly in the client
   // instead of creating factories. See http://crbug.com/586211
 
   // Returns the RendererFactory to be used by MojoRendererService.
   virtual std::unique_ptr<RendererFactory> CreateRendererFactory(
       const scoped_refptr<MediaLog>& media_log);
@@ skipping 10 matching lines @@
   virtual std::unique_ptr<CdmFactory> CreateCdmFactory(
       shell::mojom::InterfaceProvider* interface_provider);
 
  protected:
   MojoMediaClient();
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_