Revert "Move mojo edk into mojo/edk"

mojo/edk/embedder/platform_support.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_PLATFORM_SUPPORT_H_
-#define MOJO_EDK_EMBEDDER_PLATFORM_SUPPORT_H_
-
-#include <stddef.h>
-
-#include "base/macros.h"
-#include "mojo/edk/embedder/scoped_platform_handle.h"
-#include "mojo/edk/system/system_impl_export.h"
-
-namespace mojo {
-namespace embedder {
-
-class PlatformSharedBuffer;
-
-// This class is provided by the embedder to implement (typically
-// platform-dependent) things needed by the Mojo system implementation.
-class MOJO_SYSTEM_IMPL_EXPORT PlatformSupport {
- public:
-  virtual ~PlatformSupport() {}
-
-  virtual PlatformSharedBuffer* CreateSharedBuffer(size_t num_bytes) = 0;
-  virtual PlatformSharedBuffer* CreateSharedBufferFromHandle(
-      size_t num_bytes,
-      ScopedPlatformHandle platform_handle) = 0;
-
- protected:
-  PlatformSupport() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(PlatformSupport);
-};
-
-}  // namespace embedder
-}  // namespace mojo
-
-#endif  // MOJO_EDK_EMBEDDER_PLATFORM_SUPPORT_H_