Plumb render view ID to media observer

content/renderer/renderer_webkitplatformsupport_impl.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/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/metrics/histogram.h"
@@ skipping 579 matching lines @@
 size_t RendererWebKitPlatformSupportImpl::audioHardwareBufferSize() {
   return audio_hardware::GetOutputBufferSize();
 }
 
 WebAudioDevice*
 RendererWebKitPlatformSupportImpl::createAudioDevice(
     size_t bufferSize,
     unsigned numberOfChannels,
     double sampleRate,
     WebAudioDevice::RenderCallback* callback) {
+  WebFrame* web_frame = WebFrame::frameForCurrentContext();
+  if (!web_frame)
+    return NULL;
+  RenderViewImpl* render_view = RenderViewImpl::FromWebView(web_frame->view());
+  if (!render_view)
+    return NULL;
+
   ChannelLayout layout = CHANNEL_LAYOUT_UNSUPPORTED;
 
   // The |numberOfChannels| does not exactly identify the channel layout of the
   // device. The switch statement below assigns a best guess to the channel
   // layout based on number of channels.
   // TODO(crogers): WebKit should give the channel layout instead of the hard
   // channel count.
   switch (numberOfChannels) {
     case 1:
       layout = CHANNEL_LAYOUT_MONO;
@@ skipping 20 matching lines @@
       layout = CHANNEL_LAYOUT_7_1;
       break;
     default:
       layout = CHANNEL_LAYOUT_STEREO;
   }
 
   media::AudioParameters params(
       media::AudioParameters::AUDIO_PCM_LOW_LATENCY, layout,
       static_cast<int>(sampleRate), 16, bufferSize);
 
-  return new RendererWebAudioDeviceImpl(params, callback);
+  return new RendererWebAudioDeviceImpl(render_view, params, callback);
 }
 
 //------------------------------------------------------------------------------
 
 WebKit::WebString
 RendererWebKitPlatformSupportImpl::signedPublicKeyAndChallengeString(
     unsigned key_size_index,
     const WebKit::WebString& challenge,
     const WebKit::WebURL& url) {
   std::string signed_public_key;
@@ skipping 89 matching lines @@
     bool enable) {
   bool was_enabled = g_sandbox_enabled;
   g_sandbox_enabled = enable;
   return was_enabled;
 }
 
 GpuChannelHostFactory*
 RendererWebKitPlatformSupportImpl::GetGpuChannelHostFactory() {
   return RenderThreadImpl::current();
 }