Add a mimeHandler extension API.

chrome/browser/resources/pdf/pdf.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.
 
 'use strict';
 
 /**
  * @return {number} Width of a scrollbar in pixels
  */
 function getScrollbarWidth() {
@@ skipping 473 matching lines @@
         this.viewport_.position = position;
         break;
       case 'setTranslatedStrings':
         this.passwordScreen_.text = message.data.getPasswordString;
         this.progressBar_.text = message.data.loadingString;
         if (!this.isPrintPreview_)
           this.progressBar_.style.visibility = 'visible';
         this.errorScreen_.text = message.data.loadFailedString;
         break;
       case 'cancelStreamUrl':
-        chrome.streamsPrivate.abort(this.streamDetails_.streamUrl);
+        chrome.mimeHandlerPrivate.abortStream();
         break;
       case 'bookmarks':
         this.bookmarks_ = message.data.bookmarks;
         break;
     }
   },
 
   /**
    * @private
    * A callback that's called before the zoom changes. Notify the plugin to stop
@@ skipping 199 matching lines @@
               this.streamDetails_.tabId != -1);
   },
 
   /**
    * @type {Viewport} the viewport of the PDF viewer.
    */
   get viewport() {
     return this.viewport_;
   }
 };