Simplify AudioInputRendererHost IPC interface.

content/renderer/pepper/pepper_platform_audio_input.cc

 // 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.
 
 #include "content/renderer/pepper/pepper_platform_audio_input.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 95 matching lines @@
     if (client_) {
       client_->StreamCreated(handle, length, socket_handle);
     } else {
       // Clean up the handles.
       base::SyncSocket temp_socket(socket_handle);
       base::SharedMemory temp_shared_memory(handle, false);
     }
   }
 }
 
-void PepperPlatformAudioInput::OnVolume(double volume) {}
-
-void PepperPlatformAudioInput::OnStateChanged(
-    media::AudioInputIPCDelegateState state) {}
+void PepperPlatformAudioInput::OnError() {}
 
 void PepperPlatformAudioInput::OnIPCClosed() { ipc_.reset(); }
 
 PepperPlatformAudioInput::~PepperPlatformAudioInput() {
   // Make sure we have been shut down. Warning: this may happen on the I/O
   // thread!
   // Although these members should be accessed on a specific thread (either the
   // main thread or the I/O thread), it should be fine to examine their value
   // here.
   DCHECK(!ipc_);
@@ skipping 151 matching lines @@
 PepperMediaDeviceManager* PepperPlatformAudioInput::GetMediaDeviceManager() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   RenderFrameImpl* const render_frame =
       RenderFrameImpl::FromRoutingID(render_frame_id_);
   return render_frame ?
       PepperMediaDeviceManager::GetForRenderFrame(render_frame).get() : NULL;
 }
 
 }  // namespace content