Fix sky include guards to match Chromium style

sky/engine/public/platform/WebGestureCurve.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebGestureCurve_h
-#define WebGestureCurve_h
+#ifndef SKY_ENGINE_PUBLIC_PLATFORM_WEBGESTURECURVE_H_
+#define SKY_ENGINE_PUBLIC_PLATFORM_WEBGESTURECURVE_H_
 
 namespace blink {
 
 class WebGestureCurveTarget;
 
 // Abstract interface for curves used by ActivePlatformGestureAnimation. A
 // WebGestureCurve defines the animation parameters as a function of time
 // (zero-based), and applies the parameters directly to the target of the
 // animation.
 class WebGestureCurve {
 public:
     virtual ~WebGestureCurve() { }
 
     // Returns false if curve has finished and can no longer be applied.
     virtual bool apply(double time, WebGestureCurveTarget*) = 0;
 };
 
 } // namespace blink
 
-#endif
+#endif  // SKY_ENGINE_PUBLIC_PLATFORM_WEBGESTURECURVE_H_