Implement chrome.fileSystem.requestFileSystem().

ui/file_manager/image_loader/image_loader.js

 // Copyright 2013 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.
 
 /**
  * Loads and resizes an image.
  * @constructor
  */
 function ImageLoader() {
   /**
    * Persistent cache object.
    * @type {Cache}
    * @private
    */
   this.cache_ = new Cache();
 
   /**
    * Manages pending requests and runs them in order of priorities.
    * @type {Scheduler}
    * @private
    */
   this.scheduler_ = new Scheduler();
 
   // Grant permissions to all volumes, initialize the cache and then start the
   // scheduler.
   chrome.fileManagerPrivate.getVolumeMetadataList(function(volumeMetadataList) {
+    // Listen for mount events, and grant permissions to volumes being mounted.
+    chrome.fileManagerPrivate.onMountCompleted.addListener(
+        function(event) {
+          if (event.eventType == 'mount' && event.status == 'success') {

[hirono, 2015/03/19 03:33:54]

nit: === are preferred.

[mtomasz, 2015/03/19 10:28:41]

Done.

+            chrome.fileSystem.requestFileSystem(
+                {volumeId: event.volumeMetadata.volumeId}, function() {});
+          }
+        });
     var initPromises = volumeMetadataList.map(function(volumeMetadata) {
       var requestPromise = new Promise(function(callback) {
-        chrome.fileManagerPrivate.requestFileSystem(
-            volumeMetadata.volumeId,
+        chrome.fileSystem.requestFileSystem(
+            {volumeId: volumeMetadata.volumeId},
             callback);
       });
       return requestPromise;
     });
     initPromises.push(new Promise(function(resolve, reject) {
       this.cache_.initialize(resolve);
     }.bind(this)));
 
     // After all initialization promises are done, start the scheduler.
     Promise.all(initPromises).then(this.scheduler_.start.bind(this.scheduler_));
-
-    // Listen for mount events, and grant permissions to volumes being mounted.
-    chrome.fileManagerPrivate.onMountCompleted.addListener(
-        function(event) {
-          if (event.eventType == 'mount' && event.status == 'success') {
-            chrome.fileManagerPrivate.requestFileSystem(
-                event.volumeMetadata.volumeId, function() {});
-          }
-        });
   }.bind(this));
 
   // Listen for incoming requests.
   chrome.runtime.onMessageExternal.addListener(
       function(request, sender, sendResponse) {
         if (ImageLoader.ALLOWED_CLIENTS.indexOf(sender.id) !== -1) {
           // Sending a response may fail if the receiver already went offline.
           // This is not an error, but a normal and quite common situation.
           var failSafeSendResponse = function(response) {
             try {
@@ skipping 166 matching lines @@
   targetContext.translate(target.width / 2, target.height / 2);
   targetContext.rotate(orientation * Math.PI / 2);
   targetContext.drawImage(
       source,
       0, 0,
       source.width, source.height,
       -drawImageWidth / 2, -drawImageHeight / 2,
       drawImageWidth, drawImageHeight);
   targetContext.restore();
 };