Part 2: Plumb render view ID to content::MediaObserver

chrome/browser/resources/media_internals/media_internals.js

 // Copyright (c) 2011 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 src="cache_entry.js"/>
 <include src="disjoint_range_set.js"/>
 <include src="event_list.js"/>
 <include src="item_store.js"/>
 <include src="media_player.js"/>
 <include src="metrics.js"/>
@@ skipping 46 matching lines @@
      * Render a single stream as a <li>.
      * @param {Object} stream The stream to render.
      * @return {HTMLElement} A <li> containing the stream information.
      */
     function printStream(stream) {
       var out = document.createElement('li');
       out.id = stream.id;
       out.className = 'audio-stream';
       out.setAttribute('status', stream.status);
 
+      if (typeof stream.tab_title != 'undefined') {
+        out.textContent += '"' + stream.tab_title + '": ';
+      }
       out.textContent += 'Audio stream ' + stream.id.split('.')[1];
       out.textContent += ' is ' + (stream.playing ? 'playing' : 'paused');
       if (typeof stream.volume != 'undefined') {
         out.textContent += ' at ' + (stream.volume * 100).toFixed(0);
         out.textContent += '% volume.';
       }
       return out;
     }
 
     var out = document.createElement('ul');
@@ skipping 195 matching lines @@
     onMediaEvent: onMediaEvent
   };
 });
 
 /**
  * Initialize everything once we have access to the DOM.
  */
 document.addEventListener('DOMContentLoaded', function() {
   media.initialize();
 });