Allow EmbedRoot to be called multiple times.

mojo/mojo_services.gypi

 # Copyright (c) 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.
 
 {
   'targets': [
     {
       'target_name': 'mojo_echo_bindings',
       'type': 'static_library',
       'sources': [
@@ skipping 493 matching lines @@
         'services/public/cpp/view_manager/lib/node_private.cc',
         'services/public/cpp/view_manager/lib/node_private.h',
         'services/public/cpp/view_manager/lib/view.cc',
         'services/public/cpp/view_manager/lib/view_private.cc',
         'services/public/cpp/view_manager/lib/view_private.h',
         'services/public/cpp/view_manager/lib/view_manager_client_impl.cc',
         'services/public/cpp/view_manager/lib/view_manager_client_impl.h',
         'services/public/cpp/view_manager/node.h',
         'services/public/cpp/view_manager/node_observer.h',
         'services/public/cpp/view_manager/view.h',
-        'services/public/cpp/view_manager/view_event_dispatcher.h',
         'services/public/cpp/view_manager/view_manager.h',
         'services/public/cpp/view_manager/view_manager_delegate.h',
         'services/public/cpp/view_manager/view_observer.h',
+        'services/public/cpp/view_manager/window_manager_delegate.h',
       ],
       'export_dependent_settings': [
         'mojo_view_manager_bindings',
       ],
     },
     {
       'target_name': 'mojo_view_manager_lib_unittests',
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 324 matching lines @@
             'mojo_system_impl',
           ],
           'sources': [
             'services/dbus_echo/dbus_echo_service.cc',
           ],
         },
       ],
     }],
   ],
 }