EDK: Convert remaining scoped_ptr -> std::unique_ptr in //mojo/edk/system.

mojo/edk/system/message_pipe.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_EDK_SYSTEM_MESSAGE_PIPE_H_
 #define MOJO_EDK_SYSTEM_MESSAGE_PIPE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "mojo/edk/embedder/platform_handle_vector.h"
 #include "mojo/edk/system/channel_endpoint_client.h"
 #include "mojo/edk/system/dispatcher.h"
 #include "mojo/edk/system/handle_signals_state.h"
 #include "mojo/edk/system/memory.h"
 #include "mojo/edk/system/message_in_transit.h"
 #include "mojo/edk/system/message_pipe_endpoint.h"
 #include "mojo/edk/system/mutex.h"
 #include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/c/system/message_pipe.h"
@@ skipping 95 matching lines @@
   void OnDetachFromChannel(unsigned port) override;
 
  private:
   MessagePipe();
   ~MessagePipe() override;
 
   // This is used internally by |WriteMessage()| and by |OnReadMessage()|.
   // |transports| may be non-null only if it's nonempty and |message| has no
   // dispatchers attached. Must be called with |lock_| held.
   MojoResult EnqueueMessageNoLock(unsigned port,
-                                  scoped_ptr<MessageInTransit> message,
+                                  std::unique_ptr<MessageInTransit> message,
                                   std::vector<DispatcherTransport>* transports)
       MOJO_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
 
   // Helper for |EnqueueMessageNoLock()|.
   MojoResult AttachTransportsNoLock(
       unsigned port,
       MessageInTransit* message,
       std::vector<DispatcherTransport>* transports)
       MOJO_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
 
   mutable Mutex mutex_;
-  scoped_ptr<MessagePipeEndpoint> endpoints_[2] MOJO_GUARDED_BY(mutex_);
+  std::unique_ptr<MessagePipeEndpoint> endpoints_[2] MOJO_GUARDED_BY(mutex_);
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(MessagePipe);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_MESSAGE_PIPE_H_