Material PDF: Variety of minor UI bugfixes

chrome/test/data/pdf/toolbar_manager_test.js

 // Copyright 2015 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 tests = [
   /**
    * Test that ToolbarManager.forceHideTopToolbar hides (or shows) the top
    * toolbar correctly for different mouse movements.
    */
   function testToolbarManagerForceHideTopToolbar() {
@@ skipping 59 matching lines @@
   function testToolbarManagerResizeDropdown() {
     var mockWindow = new MockWindow(1920, 1080);
     var mockZoomToolbar = {
       clientHeight: 400
     };
     var toolbar = document.getElementById('material-toolbar');
     var bookmarksDropdown = toolbar.$.bookmarks;
 
     var toolbarManager =
         new ToolbarManager(mockWindow, toolbar, mockZoomToolbar);
+    toolbarManager.enableToolbars();
 
-    chrome.test.assertTrue(bookmarksDropdown.lowerBound == 680);
+    chrome.test.assertEq(680, bookmarksDropdown.lowerBound);
 
     mockWindow.setSize(1920, 480);
-    chrome.test.assertTrue(bookmarksDropdown.lowerBound == 80);
+    chrome.test.assertEq(80, bookmarksDropdown.lowerBound);
 
     chrome.test.succeed();
   },
 ];
 
 importTestHelpers().then(function() {
   chrome.test.runTests(tests);
 });