Fix sky include guards to match Chromium style

sky/engine/public/platform/WebCompositorAnimationCurve.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 WebCompositorAnimationCurve_h
-#define WebCompositorAnimationCurve_h
+#ifndef SKY_ENGINE_PUBLIC_PLATFORM_WEBCOMPOSITORANIMATIONCURVE_H_
+#define SKY_ENGINE_PUBLIC_PLATFORM_WEBCOMPOSITORANIMATIONCURVE_H_
 
 #define WEB_SCROLL_OFFSET_ANIMATION_CURVE_IS_DEFINED 1
 
 namespace blink {
 
 class WebCompositorAnimationCurve {
 public:
     virtual ~WebCompositorAnimationCurve() { }
 
     enum TimingFunctionType {
         TimingFunctionTypeEase,
         TimingFunctionTypeEaseIn,
         TimingFunctionTypeEaseOut,
         TimingFunctionTypeEaseInOut,
         TimingFunctionTypeLinear
     };
 
     enum AnimationCurveType {
         AnimationCurveTypeFilter,
         AnimationCurveTypeFloat,
         AnimationCurveTypeTransform,
     };
 
     virtual AnimationCurveType type() const = 0;
 };
 
 } // namespace blink
 
-#endif // WebCompositorAnimationCurve_h
+#endif  // SKY_ENGINE_PUBLIC_PLATFORM_WEBCOMPOSITORANIMATIONCURVE_H_