Pass more detailed audio hardware configuration information to the renderer

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
===================================================================
--- content/renderer/renderer_webkitplatformsupport_impl.cc	(revision 187648)
+++ content/renderer/renderer_webkitplatformsupport_impl.cc	(working copy)
@@ -633,6 +633,11 @@
   return thread->GetAudioHardwareConfig()->GetOutputBufferSize();
 }
 
+unsigned RendererWebKitPlatformSupportImpl::audioHardwareOutputChannels() {
+  RenderThreadImpl* thread = RenderThreadImpl::current();
+  return thread->GetAudioHardwareConfig()->GetOutputChannels();
+}
+
 // TODO(crogers): remove deprecated API as soon as WebKit calls new API.
 WebAudioDevice*
 RendererWebKitPlatformSupportImpl::createAudioDevice(