Audio indicator in each tab

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

 // 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.
 
 #include "chrome/browser/ui/views/tabs/browser_tab_strip_controller.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 437 matching lines @@
   data->show_icon = favicon_tab_helper->ShouldDisplayFavicon();
   data->mini = model_->IsMiniTab(model_index);
   data->blocked = model_->IsTabBlocked(model_index);
   data->app = extensions::TabHelper::FromWebContents(contents)->is_app();
   if (chrome::ShouldShowProjectingIndicator(contents))
     data->capture_state = TabRendererData::CAPTURE_STATE_PROJECTING;
   else if (chrome::ShouldShowRecordingIndicator(contents))
     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,
                                              int model_index) {
   TabRendererData data;
   SetTabRendererDataFromModel(web_contents, model_index, &data, EXISTING_TAB);
   tabstrip_->SetTabData(model_index, data);
 }
 
 void BrowserTabStripController::StartHighlightTabsForCommand(
@@ skipping 33 matching lines @@
   SetTabRendererDataFromModel(contents, index, &data, NEW_TAB);
   tabstrip_->AddTabAt(index, data, is_active);
 }
 
 void BrowserTabStripController::UpdateLayoutType() {
   bool adjust_layout = false;
   TabStripLayoutType layout_type =
       DetermineTabStripLayout(g_browser_process->local_state(), &adjust_layout);
   tabstrip_->SetLayoutType(layout_type, adjust_layout);
 }