Audio indicator in each tab

chrome/browser/ui/views/tabs/tab_renderer_data.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_RENDERER_DATA_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_RENDERER_DATA_H_
 
 #include "base/process_util.h"
 #include "base/string16.h"
 #include "googleurl/src/gurl.h"
@@ skipping 11 matching lines @@
   };
 
   // Capture state of this tab. If a WebRTC media stream is active, then it is
   // recording. If tab capturing is active then it is projecting.
   enum CaptureState {
     CAPTURE_STATE_NONE,
     CAPTURE_STATE_RECORDING,
     CAPTURE_STATE_PROJECTING
   };
 
+  // Audio playing state of this tab. If muting is added this is where it
+  // should go.
+  enum AudioState {
+    AUDIO_STATE_NONE,
+    AUDIO_STATE_PLAYING
+  };
+
   TabRendererData();
   ~TabRendererData();
 
   // This interprets the crashed status to decide whether or not this
   // render data represents a tab that is "crashed" (i.e. the render
   // process died unexpectedly).
   bool IsCrashed() const {
     return (crashed_status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED ||
             crashed_status == base::TERMINATION_STATUS_PROCESS_CRASHED ||
             crashed_status == base::TERMINATION_STATUS_ABNORMAL_TERMINATION);
   }
 
   // Returns true if the TabRendererData is same as given |data|.
   bool Equals(const TabRendererData& data);
 
   gfx::ImageSkia favicon;
   NetworkState network_state;
   string16 title;
   GURL url;
   bool loading;
   base::TerminationStatus crashed_status;
   bool incognito;
   bool show_icon;
   bool mini;
   bool blocked;
   bool app;
   CaptureState capture_state;
+  AudioState audio_state;
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_RENDERER_DATA_H_