Mojo: Add BindingsSupportImpl on top of HandleWatcher

mojo/shell/context.cc

 // Copyright 2013 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.
 
 #include "mojo/shell/context.h"
 
 #include "mojo/shell/network_delegate.h"
 #include "mojo/system/core_impl.h"
 
 namespace mojo {
 namespace shell {
 
 Context::Context()
     : task_runners_(base::MessageLoop::current()->message_loop_proxy()),
       storage_(),
       loader_(task_runners_.io_runner(),
               task_runners_.file_runner(),
               scoped_ptr<net::NetworkDelegate>(new NetworkDelegate()),
               storage_.profile_path()) {
   system::CoreImpl::Init();
+  BindingsSupport::Set(&bindings_support_impl_);
 }
 
 Context::~Context() {
+  BindingsSupport::Set(NULL);
 }
 
 }  // namespace shell
 }  // namespace mojo