[scheduler] Teach scheduler about audio state

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 0891c866eb9c6f0c81afbd2f9e3d36e81a2fa8b6..ff2ea795ee21d11a97187d513ba899c9b1221fdd 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1357,6 +1357,7 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(PageMsg_WasShown, OnPageWasShown)
     IPC_MESSAGE_HANDLER(PageMsg_SetHistoryOffsetAndLength,
                         OnSetHistoryOffsetAndLength)
+    IPC_MESSAGE_HANDLER(PageMsg_AudioStateChanged, OnAudioStateChanged)
 
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateTopControlsState,
@@ -1448,6 +1449,10 @@ void RenderViewImpl::OnUpdateWindowScreenRect(gfx::Rect window_screen_rect) {
   RenderWidget::OnUpdateWindowScreenRect(window_screen_rect);
 }
 
+void RenderViewImpl::OnAudioStateChanged(bool is_audio_playing) {
+  webview()->audioStateChanged(is_audio_playing);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 void RenderViewImpl::SendUpdateState() {