Fix sky include guards to match Chromium style

sky/engine/platform/geometry/FloatBox.h

 /*
  * Copyright (c) 2014, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * 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.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
  * OWNER 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
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  */
-#ifndef FloatBox_h
-#define FloatBox_h
+#ifndef SKY_ENGINE_PLATFORM_GEOMETRY_FLOATBOX_H_
+#define SKY_ENGINE_PLATFORM_GEOMETRY_FLOATBOX_H_
 
 #include <cmath>
 #include "sky/engine/platform/geometry/FloatPoint3D.h"
 
 namespace blink {
 
 class FloatBox {
 public:
     FloatBox()
         : m_x(0)
@@ skipping 128 matching lines @@
         && a.height() == b.height() && a.depth() == b.depth();
 }
 
 inline bool operator!=(const FloatBox& a, const FloatBox& b)
 {
     return !(a == b);
 }
 
 } // namespace WebKit
 
-#endif
+#endif  // SKY_ENGINE_PLATFORM_GEOMETRY_FLOATBOX_H_