Expose flash playback status and volume control to content renderer

content/renderer/pepper/ppb_audio_impl.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 CONTENT_RENDERER_PEPPER_PPB_AUDIO_IMPL_H_
 #define CONTENT_RENDERER_PEPPER_PPB_AUDIO_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 32 matching lines @@
   // PPB_Audio_API implementation.
   PP_Resource GetCurrentConfig() override;
   PP_Bool StartPlayback() override;
   PP_Bool StopPlayback() override;
   int32_t Open(PP_Resource config_id,
                scoped_refptr<ppapi::TrackedCallback> create_callback) override;
   int32_t GetSyncSocket(int* sync_socket) override;
   int32_t GetSharedMemory(base::SharedMemory** shm,
                           uint32_t* shm_size) override;
 
+  void SetVolume(double volume);
+
+  int32_t pepper_audio_id() { return pepper_audio_id_; }

[bbudge, 2016/06/13 17:51:01]

This doesn't seem to be used anywhere. Is it for the follow up CL?

[Zhiqiang Zhang (Slow), 2016/06/14 14:15:26]

Sorry. This was in an experimental patch, and it's not needed any more.
Removed this method and related code.

+
  private:
   ~PPB_Audio_Impl() override;
 
   // AudioHelper implementation.
   void OnSetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
                        size_t shared_memory_size_,
                        base::SyncSocket::Handle socket) override;
 
   // PluginInstanceThrottler::Observer implementation.
   void OnThrottleStateChange() override;
 
   // Starts the deferred playback and unsubscribes from the throttler.
   void StartDeferredPlayback();
 
   // AudioConfig used for creating this Audio object. We own a ref.
   ppapi::ScopedPPResource config_;
 
   // PluginDelegate audio object that we delegate audio IPC through. We don't
   // own this pointer but are responsible for calling Shutdown on it.
   PepperPlatformAudioOutput* audio_;
 
   // Stream is playing, but throttled due to Plugin Power Saver.
   bool playback_throttled_;
 
+  int32_t pepper_audio_id_;
+
   DISALLOW_COPY_AND_ASSIGN(PPB_Audio_Impl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PPB_AUDIO_IMPL_H_