Mojo: Move mojo/public/system/core_cpp.h to mojo/cpp/public/system/core.h.

mojo/common/message_pump_mojo_handler.h

 // 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.
 
 #ifndef MOJO_COMMON_MESSAGE_PUMP_MOJO_HANDLER_H_
 #define MOJO_COMMON_MESSAGE_PUMP_MOJO_HANDLER_H_
 
 #include "mojo/common/mojo_common_export.h"
-#include "mojo/public/system/core_cpp.h"
+#include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
 namespace common {
 
 // Used by MessagePumpMojo to notify when a handle is either ready or has become
 // invalid.
 class MOJO_COMMON_EXPORT MessagePumpMojoHandler {
  public:
   virtual void OnHandleReady(const Handle& handle) = 0;
 
   virtual void OnHandleError(const Handle& handle, MojoResult result) = 0;
 
  protected:
   virtual ~MessagePumpMojoHandler() {}
 };
 
 }  // namespace common
 }  // namespace mojo
 
 #endif  // MOJO_COMMON_MESSAGE_PUMP_MOJO_HANDLER_H_