Forward the number of skipped frames by the OS in audio playout.

content/browser/renderer_host/media/audio_renderer_host.cc

Index: content/browser/renderer_host/media/audio_renderer_host.cc
diff --git a/content/browser/renderer_host/media/audio_renderer_host.cc b/content/browser/renderer_host/media/audio_renderer_host.cc
index 40d1adacd6521825532edd3ce8b97f078d24e800..24bb08c618aa8918b7187783bdad9382a5ef695c 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.cc
+++ b/content/browser/renderer_host/media/audio_renderer_host.cc
@@ -523,7 +523,8 @@ void AudioRendererHost::DoCreateStream(int stream_id,
   }
 
   // Create the shared memory and share with the renderer process.
-  uint32 shared_memory_size = AudioBus::CalculateMemorySize(params);
+  uint32 shared_memory_size = sizeof(AudioOutputBufferParameters) +
+                              AudioBus::CalculateMemorySize(params);
   scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory());
   if (!shared_memory->CreateAndMapAnonymous(shared_memory_size)) {
     SendErrorMessage(stream_id);