Rewrite references to "wtf/" to "platform/wtf/" in core/paint.

third_party/WebKit/Source/core/paint/BoxClipper.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 BoxClipper_h
 #define BoxClipper_h
 
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/graphics/paint/DisplayItem.h"
 #include "platform/graphics/paint/ScopedPaintChunkProperties.h"
-#include "wtf/Allocator.h"
-#include "wtf/Optional.h"
+#include "platform/wtf/Allocator.h"
+#include "platform/wtf/Optional.h"
 
 namespace blink {
 
 class LayoutBox;
 struct PaintInfo;
 
 enum ContentsClipBehavior { kForceContentsClip, kSkipContentsClipIfPossible };
 
 class BoxClipper {
   DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
 
  public:
   BoxClipper(const LayoutBox&,
              const PaintInfo&,
              const LayoutPoint& accumulated_offset,
              ContentsClipBehavior);
   ~BoxClipper();
 
  private:
   const LayoutBox& box_;
   const PaintInfo& paint_info_;
   DisplayItem::Type clip_type_;
 
   Optional<ScopedPaintChunkProperties> scoped_clip_property_;
 };
 
 }  // namespace blink
 
 #endif  // BoxClipper_h