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

third_party/WebKit/Source/core/animation/LengthPropertyFunctions.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 LengthPropertyFunctions_h
 #define LengthPropertyFunctions_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/CSSValueKeywords.h"
 #include "platform/Length.h"
-#include "wtf/Allocator.h"
+#include "platform/wtf/Allocator.h"
 
 namespace blink {
 
 class ComputedStyle;
 
 class LengthPropertyFunctions {
   STATIC_ONLY(LengthPropertyFunctions);
 
  public:
   static ValueRange getValueRange(CSSPropertyID);
   static bool isZoomedLength(CSSPropertyID);
   static bool getPixelsForKeyword(CSSPropertyID,
                                   CSSValueID,
                                   double& resultPixels);
   static bool getInitialLength(CSSPropertyID, Length& result);
   static bool getLength(CSSPropertyID, const ComputedStyle&, Length& result);
   static bool setLength(CSSPropertyID, ComputedStyle&, const Length&);
 };
 
 }  // namespace blink
 
 #endif  // LengthPropertyFunctions_h