Add paper-menu-button and its dependencies to third_party/polymer

chrome/test/data/pdf/material_elements_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.
 
 /**
  * Standalone unit tests of the PDF Polymer elements.
  */
 var tests = [
   /**
    * Test that viewer-page-selector reacts correctly to text entry. The page
@@ skipping 84 matching lines @@
         },
         {
           title: 'Test 1b',
           page: 3,
           children: []
         }]
       }],
       depth: 1
     });
 
-    // Wait for the <template>s to be properly initialized.
-    bookmarkContent.async(function() {
-      var rootBookmarks =
-          bookmarkContent.shadowRoot.querySelectorAll('viewer-bookmark');
-      chrome.test.assertEq(1, rootBookmarks.length, "one root bookmark");
-      var rootBookmark = rootBookmarks[0];
+    // Force templates to render.
+    Polymer.dom.flush();
 
-      var subBookmarks =
-          rootBookmark.shadowRoot.querySelectorAll('viewer-bookmark');
-      chrome.test.assertEq(2, subBookmarks.length, "two sub bookmarks");
-      chrome.test.assertEq(1, subBookmarks[1].depth,
-                             "sub bookmark depth correct");
+    var rootBookmarks =
+        bookmarkContent.shadowRoot.querySelectorAll('viewer-bookmark');
+    chrome.test.assertEq(1, rootBookmarks.length, "one root bookmark");
+    var rootBookmark = rootBookmarks[0];
 
-      var lastPageChange;
-      rootBookmark.addEventListener('change-page', function(e) {
-        lastPageChange = e.detail.page;
-      });
+    var subBookmarks =
+        rootBookmark.shadowRoot.querySelectorAll('viewer-bookmark');
+    chrome.test.assertEq(2, subBookmarks.length, "two sub bookmarks");
+    chrome.test.assertEq(1, subBookmarks[1].depth,
+                           "sub bookmark depth correct");
 
-      MockInteractions.tap(rootBookmark.$.item);
-      chrome.test.assertEq(1, lastPageChange);
+    var lastPageChange;
+    rootBookmark.addEventListener('change-page', function(e) {
+      lastPageChange = e.detail.page;
+    });
 
-      MockInteractions.tap(subBookmarks[1].$.item);
-      chrome.test.assertEq(3, lastPageChange);
+    MockInteractions.tap(rootBookmark.$.item);
+    chrome.test.assertEq(1, lastPageChange);
 
-      var subBookmarkDiv =
-          rootBookmark.shadowRoot.querySelector('.sub-bookmark');
+    MockInteractions.tap(subBookmarks[1].$.item);
+    chrome.test.assertEq(3, lastPageChange);
 
-      chrome.test.assertTrue(subBookmarkDiv.hidden);
-      MockInteractions.tap(rootBookmark.$.expand);
-      chrome.test.assertFalse(subBookmarkDiv.hidden);
-      chrome.test.assertEq('hidden', subBookmarks[1].$.expand.style.visibility);
+    var subBookmarkDiv =
+        rootBookmark.shadowRoot.querySelector('.sub-bookmark');
 
-      chrome.test.succeed();
-    });
+    chrome.test.assertTrue(subBookmarkDiv.hidden);
+    MockInteractions.tap(rootBookmark.$.expand);
+    chrome.test.assertFalse(subBookmarkDiv.hidden);
+    chrome.test.assertEq('hidden', subBookmarks[1].$.expand.style.visibility);
+
+    chrome.test.succeed();
   }
 ];
 
 importTestHelpers().then(function() {
   chrome.test.runTests(tests);
 });