EDK: Remove platform_handle_utils*.

mojo/edk/platform/scoped_platform_handle.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_PLATFORM_SCOPED_PLATFORM_HANDLE_H_
 #define MOJO_EDK_PLATFORM_SCOPED_PLATFORM_HANDLE_H_
 
 #include "mojo/edk/platform/platform_handle.h"
 #include "mojo/public/c/system/macros.h"
 #include "mojo/public/cpp/system/macros.h"
@@ skipping 32 matching lines @@
     return rv;
   }
 
   void reset(PlatformHandle handle = PlatformHandle()) {
     handle_.CloseIfNecessary();
     handle_ = handle;
   }
 
   bool is_valid() const { return handle_.is_valid(); }
 
+  // Forwards to |PlatformHandle::Duplicate()|.
+  ScopedPlatformHandle Duplicate() const { return handle_.Duplicate(); }
+
  private:
   PlatformHandle handle_;
 
   MOJO_MOVE_ONLY_TYPE(ScopedPlatformHandle);
 };
 
 }  // namespace platform
 }  // namespace mojo
 
 #endif  // MOJO_EDK_PLATFORM_SCOPED_PLATFORM_HANDLE_H_