[MD History] Add routing to the synced devices page.

chrome/browser/resources/md_history/compiled_resources2.gyp

 # 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.
 {
   'targets': [
     {
       'target_name': 'constants',
       'dependencies': [
         '../history/compiled_resources2.gyp:externs',
       ],
@@ skipping 71 matching lines @@
         'grouped_list',
         'history_list',
         '<(EXTERNS_GYP):chrome_send',
         '../history/compiled_resources2.gyp:externs',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'app',
       'dependencies': [
+        # TODO(calamity): Add app-route elements after closure issues are fixed.
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:util',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:command',
         'constants',
         'history_toolbar',
         'list_container',
         'side_bar',
         'synced_device_card',
         'synced_device_manager',
         '../history/compiled_resources2.gyp:externs',
       ],
@@ skipping 19 matching lines @@
     },
     {
       'target_name': 'synced_device_manager',
       'dependencies': [
         'synced_device_card',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }