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

third_party/WebKit/Source/platform/animation/CompositorKeyframe.h

 // Copyright 2016 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 CompositorKeyframe_h
 #define CompositorKeyframe_h
 
 #include "platform/PlatformExport.h"
-#include "wtf/PassRefPtr.h"
+#include "platform/wtf/PassRefPtr.h"
 
 namespace cc {
 class TimingFunction;
 }
 
 namespace blink {
 
 class TimingFunction;
 
 class PLATFORM_EXPORT CompositorKeyframe {
  public:
   virtual ~CompositorKeyframe() {}
 
   virtual double time() const = 0;
 
   PassRefPtr<TimingFunction> getTimingFunctionForTesting() const;
 
  private:
   virtual const cc::TimingFunction* ccTimingFunction() const = 0;
 };
 
 }  // namespace blink
 
 #endif  // CompositorKeyframe_h