Mojo: Move system embedder API files to mojo/system/embedder.

mojo/system/raw_channel.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_SYSTEM_RAW_CHANNEL_H_
 #define MOJO_SYSTEM_RAW_CHANNEL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "mojo/system/constants.h"
-#include "mojo/system/scoped_platform_handle.h"
+#include "mojo/system/embedder/scoped_platform_handle.h"
 #include "mojo/system/system_impl_export.h"
 
 namespace base {
 class MessageLoop;
 }
 
 namespace mojo {
 namespace system {
 
 class MessageInTransit;
@@ skipping 69 matching lines @@
   Delegate* const delegate_;
   base::MessageLoop* const message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(RawChannel);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_RAW_CHANNEL_H_