Fix sky include guards to match Chromium style

sky/engine/platform/graphics/test/MockWebGraphicsContext3D.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
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  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
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  *     notice, this list of conditions and the following disclaimer in the
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  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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-#ifndef MockWebGraphicsContext3D_h
-#define MockWebGraphicsContext3D_h
+#ifndef SKY_ENGINE_PLATFORM_GRAPHICS_TEST_MOCKWEBGRAPHICSCONTEXT3D_H_
+#define SKY_ENGINE_PLATFORM_GRAPHICS_TEST_MOCKWEBGRAPHICSCONTEXT3D_H_
 
 #include "sky/engine/platform/PlatformExport.h"
 #include "sky/engine/public/platform/WebGraphicsContext3D.h"
 
 namespace blink {
 
 // WebGraphicsContext3D base class for use in WebKit unit tests.
 // All operations are no-ops (returning 0 if necessary).
 class MockWebGraphicsContext3D : public WebGraphicsContext3D {
 public:
@@ skipping 249 matching lines @@
 
     void fakeContextLost() { m_contextLost = true; }
 protected:
     unsigned m_nextTextureId;
     bool m_contextLost;
     Attributes m_attrs;
 };
 
 } // namespace blink
 
-#endif // MockWebGraphicsContext3D_h
+#endif  // SKY_ENGINE_PLATFORM_GRAPHICS_TEST_MOCKWEBGRAPHICSCONTEXT3D_H_