[File Manager] Use content url for playing media files from a gdata directory

chrome/browser/resources/file_manager/js/file_manager.js

 // 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.
 
 // Setting the src of an img to an empty string can crash the browser, so we
 // use an empty 1x1 gif instead.
 const EMPTY_IMAGE_URI = 'data:image/gif;base64,'
         + 'R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw%3D%3D';
 
 /**
@@ skipping 539 matching lines @@
     this.summarizeSelection_();
 
     var sortField =
         window.localStorage['sort-field-' + this.dialogType_] || 'cachedMtime_';
     var sortDirection =
         window.localStorage['sort-direction-' + this.dialogType_] || 'desc';
     this.directoryModel_.fileList.sort(sortField, sortDirection);
 
     this.refocus();
 
-    this.localMetadataProvider_ = this.createLocalMetadataProvider_();
-    this.gdataMetadataProvider_ = new GDataMetadataProvider();
+    this.metadataProvider_ =
+        new MetadataProvider(this.filesystem_.root.toURL());
+
+    // PyAuto tests monitor this state by polling this variable
+    this.__defineGetter__('workerInitialized_', function() {
+       return self.getMetadataProvider().isInitialized();
+    });
 
     this.table_.list.endBatchUpdates();
     this.grid_.endBatchUpdates();
 
     metrics.recordInterval('Load.DOM');
     metrics.recordInterval('Load.Total');
   };
 
   /**
    * One-time initialization of commands.
@@ skipping 1612 matching lines @@
       setVisibility('visible');
       self.onResize_();
     }
 
     function setVisibility(visibility) {
       panel.setAttribute('visibility', visibility);
     }
   };
 
 
-  FileManager.prototype.createLocalMetadataProvider_ = function() {
-    // Subclass MetadataProvider to notify tests when the initialization
-    // is complete.
-
-    var fileManager = this;
-
-    function TestAwareMetadataProvider () {
-      MetadataProvider.apply(this, arguments);
-    }
-
-    TestAwareMetadataProvider.prototype = {
-      __proto__: MetadataProvider.prototype,
-
-      onInitialized_: function() {
-        MetadataProvider.prototype.onInitialized_.apply(this, arguments);
-
-        // We're ready to run.  Tests can monitor for this state with
-        // ExtensionTestMessageListener listener("worker-initialized");
-        // ASSERT_TRUE(listener.WaitUntilSatisfied());
-        // Automated tests need to wait for this, otherwise we crash in
-        // browser_test cleanup because the worker process still has
-        // URL requests in-flight.
-        chrome.test.sendMessage('worker-initialized');
-        // PyAuto tests monitor this state by polling this variable
-        fileManager.workerInitialized_ = true;
-      }
-    };
-
-    return new TestAwareMetadataProvider();
-  };
-
   FileManager.prototype.isOnGData = function() {
     return this.directoryModel_ &&
         this.directoryModel_.rootPath == '/' + DirectoryModel.GDATA_DIRECTORY;
   };
 
   FileManager.prototype.getMetadataProvider = function() {
-    if (this.isOnGData())
-      return this.gdataMetadataProvider_;
-    else
-      return this.localMetadataProvider_;
+    return this.metadataProvider_;
   };
 
   /**
    * Callback called when tasks for selected files are determined.
    * @param {Object} selection Selection is passed here, since this.selection
    *     can change before tasks were found, and we should be accurate.
    * @param {Array.<Task>} tasksList The tasks list.
    */
   FileManager.prototype.onTasksFound_ = function(selection, tasksList) {
     this.taskItems_.clear();
@@ skipping 1917 matching lines @@
           });
       }, onError);
 
       function onError(err) {
         console.log('Error while checking free space: ' + err);
         setTimeout(doCheck, 1000 * 60);
       }
     }
   }
 })();