Add accessibility function to PDFScriptingAPI

chrome/test/data/pdf/basic_plugin_test.js

 // Copyright 2014 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.
 
 /**
  * These tests require that the PDF plugin be available to run correctly.
  */
 var tests = [
   /**
    * Test that the page is sized to the size of the document.
    */
   function testPageSize() {
     // Verify that the initial zoom is 100%.
     chrome.test.assertEq(1, viewer.viewport.zoom);
 
     var sizer = document.getElementById('sizer');
     chrome.test.assertEq(826, sizer.offsetWidth);
     chrome.test.assertEq(1066, sizer.offsetHeight);
     chrome.test.succeed();
   },
+
+  function testAccessibility() {
+    var client = new PDFScriptingAPI(window, window.location.origin);
+    client.setDestinationWindow(window);
+    client.getAccessibilityJSON(chrome.test.callbackPass(function(json) {
+      chrome.test.assertEq('{"copyable":true,"loaded":true,"numberOfPages":1}',
+                           json);
+    }));
+  },
+
+  function testAccessibilityWithPage() {
+    var client = new PDFScriptingAPI(window, window.location.origin);
+    client.setDestinationWindow(window);
+    client.getAccessibilityJSON(chrome.test.callbackPass(function(json) {
+      chrome.test.assertEq(
+          '{"height":792.0,"textBox":[{"fontSize":1.0,' +
+          '"height":8.8680419921875,"left":77.13200378417969,' +

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

Are these values going to work cross-platform?

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

Good point - I got rid of the checks for floating point data.

+          '"textNodes":[{"text":"this is some text","type":"text"}],' +
+          '"top":74.3599853515625,"width":85.58399963378906},' +
+          '{"fontSize":1.0,"height":8.25604248046875,' +
+          '"left":77.38400268554688,' +
+          '"textNodes":[{"text":"some more text","type":"text"}],' +
+          '"top":88.97198486328125,"width":82.30081176757812}],"width":612.0}',
+          json);
+    }), 0);
+  }
 ];
 
 window.addEventListener('pdfload', function() {
   chrome.test.runTests(tests);
 });