Plumb render view ID from audio-related code in renderer through IPCs to AudioRendererHost in brows…

content/renderer/pepper/pepper_platform_audio_input_impl.cc

Index: content/renderer/pepper/pepper_platform_audio_input_impl.cc
diff --git a/content/renderer/pepper/pepper_platform_audio_input_impl.cc b/content/renderer/pepper/pepper_platform_audio_input_impl.cc
index 94b9e922ce74af4840c8a0e5b6ab575c48e22221..e219a35780468d000f13336675fb01633c245adc 100644
--- a/content/renderer/pepper/pepper_platform_audio_input_impl.cc
+++ b/content/renderer/pepper/pepper_platform_audio_input_impl.cc
@@ -18,13 +18,14 @@ namespace content {
 
 // static
 PepperPlatformAudioInputImpl* PepperPlatformAudioInputImpl::Create(
+    int render_view_id,
     const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
     const std::string& device_id,
     int sample_rate,
     int frames_per_buffer,
     webkit::ppapi::PluginDelegate::PlatformAudioInputClient* client) {
   scoped_refptr<PepperPlatformAudioInputImpl> audio_input(
-      new PepperPlatformAudioInputImpl());
+      new PepperPlatformAudioInputImpl(render_view_id));
   if (audio_input->Initialize(plugin_delegate, device_id, sample_rate,
                               frames_per_buffer, client)) {
     // Balanced by Release invoked in
@@ -120,7 +121,7 @@ void PepperPlatformAudioInputImpl::OnDeviceReady(const std::string& device_id) {
 }
 
 void PepperPlatformAudioInputImpl::OnIPCClosed() {
-  ipc_ = NULL;
+  ipc_.reset();
 }
 
 PepperPlatformAudioInputImpl::~PepperPlatformAudioInputImpl() {
@@ -135,12 +136,13 @@ PepperPlatformAudioInputImpl::~PepperPlatformAudioInputImpl() {
   DCHECK(shutdown_called_);
 }
 
-PepperPlatformAudioInputImpl::PepperPlatformAudioInputImpl()
+PepperPlatformAudioInputImpl::PepperPlatformAudioInputImpl(int render_view_id)
     : client_(NULL),
       stream_id_(0),
       main_message_loop_proxy_(base::MessageLoopProxy::current()),
       shutdown_called_(false) {
-  ipc_ = RenderThreadImpl::current()->audio_input_message_filter();
+  ipc_ = RenderThreadImpl::current()->audio_input_message_filter()->
+      CreateAudioInputIPC(render_view_id);
 }
 
 bool PepperPlatformAudioInputImpl::Initialize(