Add a scroll offset to PDF documents to account for the top material design toolbar.

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.
 
 var scriptingAPI;
 
 /**
  * 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 less than or equal to 100%.
     chrome.test.assertTrue(viewer.viewport.zoom <= 1);
 
     viewer.viewport.setZoom(1);
     var sizer = document.getElementById('sizer');
     chrome.test.assertEq(826, sizer.offsetWidth);
-    chrome.test.assertEq(1066, sizer.offsetHeight);
+    chrome.test.assertEq(1066 + viewer.viewport.topToolbarHeight_,
+                         sizer.offsetHeight);
     chrome.test.succeed();
   },
 
   function testAccessibility() {
     scriptingAPI.getAccessibilityJSON(chrome.test.callbackPass(function(json) {
       var dict = JSON.parse(json);
       chrome.test.assertEq(true, dict.copyable);
       chrome.test.assertEq(true, dict.loaded);
       chrome.test.assertEq(1, dict.numberOfPages);
     }));
@@ skipping 21 matching lines @@
     client.getSelectedText(chrome.test.callbackPass(function(selectedText) {
       chrome.test.assertEq('this is some text\nsome more text', selectedText);
     }));
   },
 ];
 
 var scriptingAPI = new PDFScriptingAPI(window, window);
 scriptingAPI.setLoadCallback(function() {
   chrome.test.runTests(tests);
 });