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

media/audio/audio_input_device.cc

Index: media/audio/audio_input_device.cc
diff --git a/media/audio/audio_input_device.cc b/media/audio/audio_input_device.cc
index e4577879900d11a47a7b13798d80e48e16bae008..1375ae9909cd1abb1e9ce9b1072990a56a429fa5 100644
--- a/media/audio/audio_input_device.cc
+++ b/media/audio/audio_input_device.cc
@@ -40,12 +40,12 @@ class AudioInputDevice::AudioThreadCallback
 };
 
 AudioInputDevice::AudioInputDevice(
-    AudioInputIPC* ipc,
+    scoped_ptr<AudioInputIPC> ipc,
     const scoped_refptr<base::MessageLoopProxy>& io_loop)
     : ScopedLoopObserver(io_loop),
       callback_(NULL),
       event_handler_(NULL),
-      ipc_(ipc),
+      ipc_(ipc.Pass()),
       stream_id_(0),
       session_id_(0),
       pending_device_ready_(false),
@@ -209,7 +209,7 @@ void AudioInputDevice::OnDeviceReady(const std::string& device_id) {
 }
 
 void AudioInputDevice::OnIPCClosed() {
-  ipc_ = NULL;
+  ipc_.reset();
 }
 
 AudioInputDevice::~AudioInputDevice() {