Revert "Move mojo edk into mojo/edk"

mojo/embedder/simple_platform_shared_buffer.h

 // Copyright 2014 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_EMBEDDER_SIMPLE_PLATFORM_SHARED_BUFFER_H_
-#define MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SHARED_BUFFER_H_
+#ifndef MOJO_SYSTEM_SIMPLE_PLATFORM_SHARED_BUFFER_H_
+#define MOJO_SYSTEM_SIMPLE_PLATFORM_SHARED_BUFFER_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
-#include "mojo/edk/embedder/platform_shared_buffer.h"
-#include "mojo/edk/system/system_impl_export.h"
+#include "mojo/embedder/platform_shared_buffer.h"
+#include "mojo/system/system_impl_export.h"
 
 namespace mojo {
 namespace embedder {
 
 // A simple implementation of |PlatformSharedBuffer|.
 class MOJO_SYSTEM_IMPL_EXPORT SimplePlatformSharedBuffer
     : public PlatformSharedBuffer {
  public:
   // Creates a shared buffer of size |num_bytes| bytes (initially zero-filled).
   // |num_bytes| must be nonzero. Returns null on failure.
@@ skipping 69 matching lines @@
 
   void* const real_base_;
   const size_t real_length_;
 
   DISALLOW_COPY_AND_ASSIGN(SimplePlatformSharedBufferMapping);
 };
 
 }  // namespace embedder
 }  // namespace mojo
 
-#endif  // MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SHARED_BUFFER_H_
+#endif  // MOJO_SYSTEM_SIMPLE_PLATFORM_SHARED_BUFFER_H_