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 183638)
+++ 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::ShouldShowAudioIndicator(contents))
+    data->audio_state = TabRendererData::AUDIO_STATE_PLAYING;

[sky, 2013/02/21 01:58:40]

What gets triggered when the audio state changes so that we end up here?

[cpu_(ooo_6.6-7.5), 2013/02/21 03:34:51]

web_contents->NotifyNavigationStateChanged(content::INVALIDATE_TYPE_TAB);

See https://codereview.chromium.org/11573066/

+  else
+    data->audio_state = TabRendererData::AUDIO_STATE_NONE;
 }
 
 void BrowserTabStripController::SetTabDataAt(content::WebContents* web_contents,