Add accessibility function to PDFScriptingAPI

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';
 
 <include src="../../../../ui/webui/resources/js/util.js">
 <include src="pdf_scripting_api.js">
 <include src="viewport.js">
 
@@ skipping 262 matching lines @@
         if (!this.passwordScreen_.active)
           this.passwordScreen_.active = true;
         else
           this.passwordScreen_.deny();
         break;
       case 'setTranslatedStrings':
         this.passwordScreen_.text = message.data.getPasswordString;
         this.progressBar_.text = message.data.loadingString;
         this.errorScreen_.text = message.data.loadFailedString;
         break;
+      case 'getAccessibilityJSONReply':

[Lei Zhang, 2014/05/08 06:42:53]

consider putting the cases in alphabetical order

[raymes, 2014/05/09 06:19:45]

Done.

+        this.sendScriptingMessage_(message.data);
+        break;
     }
   },
 
   /**
    * @private
    * A callback that's called when the viewport changes.
    */
   viewportChangedCallback_: function() {
     if (!this.documentDimensions_)
       return;
@@ skipping 81 matching lines @@
           type: 'resetPrintPreviewMode',
           url: message.data.url,
           grayscale: message.data.grayscale,
           // If the PDF isn't modifiable we send 0 as the page count so that no
           // blank placeholder pages get appended to the PDF.
           pageCount: (message.data.modifiable ?
                       message.data.pageNumbers.length : 0)
         });
         break;
       case 'loadPreviewPage':
+      case 'getAccessibilityJSON':
         this.plugin_.postMessage(message.data);
         break;
     }
 
   },
 
   /**
    * @private
    * Send a scripting message outside the extension (typically to
    * PDFScriptingAPI in a page containing the extension).
    * @param {Object} message the message to send.
    */
   sendScriptingMessage_: function(message) {
     window.parent.postMessage(message, '*');
   },
 
   /**
    * @type {Viewport} the viewport of the PDF viewer.
    */
   get viewport() {
     return this.viewport_;
   }
 };
 
 var viewer = new PDFViewer();