Remove old wtf/ directory.

third_party/WebKit/Source/core/imagebitmap/ImageBitmapSource.h

 // Copyright 2015 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 ImageBitmapSource_h
 #define ImageBitmapSource_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/CoreExport.h"
 #include "core/dom/ExceptionCode.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/IntSize.h"
-#include "third_party/WebKit/Source/wtf/Optional.h"
+#include "platform/wtf/Optional.h"
 
 namespace blink {
 
 class ImageBitmap;
 class ImageBitmapOptions;
 
 class CORE_EXPORT ImageBitmapSource {
  public:
   virtual IntSize BitmapSourceSize() const { return IntSize(); }
   virtual ScriptPromise CreateImageBitmap(ScriptState*,
                                           EventTarget&,
                                           Optional<IntRect>,
                                           const ImageBitmapOptions&,
                                           ExceptionState&);
 
   virtual bool IsBlob() const { return false; }
 
   static ScriptPromise FulfillImageBitmap(ScriptState*, ImageBitmap*);
 
  protected:
   virtual ~ImageBitmapSource() {}
 };
 
 }  // namespace blink
 
 #endif