Fix sky include guards to match Chromium style

sky/engine/platform/geometry/FloatSize.h

 /*
  * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2005 Nokia.  All rights reserved.
  *               2008 Eric Seidel <eric@webkit.org>
  *
  * 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
  * 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 FloatSize_h
-#define FloatSize_h
+#ifndef SKY_ENGINE_PLATFORM_GEOMETRY_FLOATSIZE_H_
+#define SKY_ENGINE_PLATFORM_GEOMETRY_FLOATSIZE_H_
 
 #include "sky/engine/platform/geometry/IntPoint.h"
 #include "sky/engine/wtf/MathExtras.h"
 
 namespace blink {
 
 class IntSize;
 class LayoutSize;
 
 class PLATFORM_EXPORT FloatSize {
@@ skipping 132 matching lines @@
     return IntSize(clampToInteger(ceilf(p.width())), clampToInteger(ceilf(p.height())));
 }
 
 inline IntPoint flooredIntPoint(const FloatSize& p)
 {
     return IntPoint(clampToInteger(floorf(p.width())), clampToInteger(floorf(p.height())));
 }
 
 } // namespace blink
 
-#endif // FloatSize_h
+#endif  // SKY_ENGINE_PLATFORM_GEOMETRY_FLOATSIZE_H_