Remove the MessageLoop::DestructionObserver from mojo bindings.

ipc/ipc_test_base.h

 // Copyright (c) 2011 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.
 
 #ifndef IPC_IPC_TEST_BASE_H_
 #define IPC_IPC_TEST_BASE_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
+#include "base/message_loop/message_loop.h"
 #include "base/process/process.h"
 #include "base/test/multiprocess_test.h"
 #include "build/build_config.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_channel_factory.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "mojo/edk/test/mojo_test_base.h"
 #include "mojo/edk/test/multiprocess_test_helper.h"
 
 namespace base {
@@ skipping 79 matching lines @@
                : 0;                                                           \
   }                                                                           \
   void client_name##_MainFixture::Main()
 
 // Use this to declare the client side for tests using IPCChannelMojoTestBase.
 #define DEFINE_IPC_CHANNEL_MOJO_TEST_CLIENT(client_name)   \
   DEFINE_IPC_CHANNEL_MOJO_TEST_CLIENT_WITH_CUSTOM_FIXTURE( \
       client_name, IpcChannelMojoTestClient)
 
 #endif  // IPC_IPC_TEST_BASE_H_