Introduce shared_memory_support media target for PPAPI

ppapi/shared_impl/ppb_audio_shared.h

 // Copyright (c) 2012 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 PPAPI_SHARED_IMPL_PPB_AUDIO_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_AUDIO_SHARED_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/sync_socket.h"
@@ skipping 11 matching lines @@
 // Implements the logic to map shared memory and run the audio thread signaled
 // from the sync socket. Both the proxy and the renderer implementation use
 // this code.
 class PPAPI_SHARED_EXPORT PPB_Audio_Shared
     : public thunk::PPB_Audio_API,
       public base::DelegateSimpleThread::Delegate {
  public:
   PPB_Audio_Shared();
   virtual ~PPB_Audio_Shared();
 
-  // Keep in sync with media::AudioOutputController::kPauseMark.
-  static const int kPauseMark;
-
   bool playing() const { return playing_; }
 
   // Sets the callback information that the background thread will use. This
   // is optional. Without a callback, the thread will not be run. This
   // non-callback mode is used in the renderer with the proxy, since the proxy
   // handles the callback entirely within the plugin process.
   void SetCallback(PPB_Audio_Callback callback, void* user_data);
 
   // Configures the current state to be playing or not. The caller is
   // responsible for ensuring the new state is the opposite of the current one.
@@ skipping 58 matching lines @@
 
   // User data pointer passed verbatim to the callback function.
   void* user_data_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Audio_Shared);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPB_AUDIO_SHARED_H_