Mojo: Move public C system header files to mojo/public/c/system/.

mojo/public/system/core_private.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_PUBLIC_SYSTEM_CORE_PRIVATE_H_
 #define MOJO_PUBLIC_SYSTEM_CORE_PRIVATE_H_
 
-#include "mojo/public/system/core.h"
+#include "mojo/public/c/system/core.h"
 
 namespace mojo {
 
 // Implementors of the core APIs can use this interface to install their
 // implementation into the mojo_system dynamic library. Mojo clients should not
 // call these functions directly.
 class MOJO_SYSTEM_EXPORT Core {
  public:
   virtual ~Core();
 
@@ skipping 59 matching lines @@
                                uint64_t offset,
                                uint64_t num_bytes,
                                void** buffer,
                                MojoMapBufferFlags flags) = 0;
   virtual MojoResult UnmapBuffer(void* buffer) = 0;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_SYSTEM_CORE_PRIVATE_H_