Audio indicator in each tab

chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc

Index: chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
===================================================================
--- chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc	(revision 184139)
+++ chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc	(working copy)
@@ -455,6 +455,11 @@
     data->capture_state = TabRendererData::CAPTURE_STATE_RECORDING;
   else
     data->capture_state = TabRendererData::CAPTURE_STATE_NONE;
+
+  if (chrome::IsPlayingAudio(contents))
+    data->audio_state = TabRendererData::AUDIO_STATE_PLAYING;
+  else
+    data->audio_state = TabRendererData::AUDIO_STATE_NONE;
 }
 
 void BrowserTabStripController::SetTabDataAt(content::WebContents* web_contents,