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

third_party/WebKit/Source/platform/animation/TimingFunction.cpp

 // 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.
 
 #include "platform/animation/TimingFunction.h"
 
-#include "wtf/text/StringBuilder.h"
+#include "platform/wtf/text/StringBuilder.h"
 
 namespace blink {
 
 String LinearTimingFunction::toString() const {
   return "linear";
 }
 
 double LinearTimingFunction::evaluate(double fraction, double) const {
   return fraction;
 }
@@ skipping 171 matching lines @@
   }
   return false;
 }
 
 // No need to define specific operator!= as they can all come via this function.
 bool operator!=(const TimingFunction& lhs, const TimingFunction& rhs) {
   return !(lhs == rhs);
 }
 
 }  // namespace blink