Move shared file type images into chrome://theme/ scheme

chrome/browser/resources/file_manager/js/mock_chrome.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.
 
 function MockEventSource() {
   this.listeners_ = [];
 }
 
 /**
  * Add a listener.
@@ skipping 141 matching lines @@
       {
         taskId: extensionId + '|gallery',
         title: 'View',
         regexp: /\.(bmp|gif|jpe?g|png|webp|3gp|avi|m4v|mov|mp4|mpeg4?|mpg4?|ogm|ogv|ogx|webm)$/i,
         iconUrl: emptyIcon
       },
       {
         taskId: 'fake-extension-id|fake-item',
         title: 'External action',
         regexp: /\.(bmp|gif|jpe?g|png|webp|3gp|avi|m4v|mov|mp4|mpeg4?|mpg4?|ogm|ogv|ogx|webm)$/i,
-        iconUrl: 'images/files/file_types/generic.png'
+        iconUrl: 'chrome://theme/IDR_FILE_MANAGER_IMG_FILETYPE_GENERIC'
       },
       {
         taskId: 'fake-extension-id|upload',
         title: 'Upload video',
         regexp: /\.(3gp|avi|m4v|mov|mp4|mpeg4?|mpg4?|ogm|ogv|ogx|webm)$/i,
-        iconUrl: 'images/files/file_types/video.png'
+        iconUrl: 'chrome://theme/IDR_FILE_MANAGER_IMG_FILETYPE_VIDEO'
       },
       {
         taskId: extensionId + '|view-in-browser',
         title: 'View',
         regexp: /\.(html?|log|mht|mhtml|txt)$/i,
         iconUrl: emptyIcon
       },
       {
         taskId: extensionId + '|view-pdf',
         title: 'View',
@@ skipping 673 matching lines @@
 
   setWindowHeight: function(height) {
     this.popup_.style.height = height + 'px';
   },
 
   closeWindow: function() {
     this.popup_.parentNode.removeChild(this.popup_);
     this.popup_ = null;
   }
 };