Fix sky include guards to match Chromium style

sky/engine/core/css/BasicShapeFunctions.h

 /*
  * Copyright (C) 2012 Adobe Systems Incorporated. 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 THE COPYRIGHT HOLDER “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 THE COPYRIGHT HOLDER 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
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  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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  */
 
-#ifndef BasicShapeFunctions_h
-#define BasicShapeFunctions_h
+#ifndef SKY_ENGINE_CORE_CSS_BASICSHAPEFUNCTIONS_H_
+#define SKY_ENGINE_CORE_CSS_BASICSHAPEFUNCTIONS_H_
 
 #include "sky/engine/core/rendering/style/BasicShapes.h"
 #include "sky/engine/platform/heap/Handle.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 
 namespace blink {
 
 class BasicShape;
 class CSSBasicShape;
 class CSSValue;
 class FloatPoint;
 class StyleResolverState;
 class RenderStyle;
 
 PassRefPtr<CSSValue> valueForBasicShape(const RenderStyle&, const BasicShape*);
 PassRefPtr<BasicShape> basicShapeForValue(const StyleResolverState&, const CSSBasicShape*);
 FloatPoint floatPointForCenterCoordinate(const BasicShapeCenterCoordinate&, const BasicShapeCenterCoordinate&, FloatSize);
 
 }
-#endif
+#endif  // SKY_ENGINE_CORE_CSS_BASICSHAPEFUNCTIONS_H_