Fix sky include guards to match Chromium style

sky/engine/platform/geometry/Region.h

 /*
  * Copyright (C) 2010, 2011 Apple 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 Region_h
-#define Region_h
+#ifndef SKY_ENGINE_PLATFORM_GEOMETRY_REGION_H_
+#define SKY_ENGINE_PLATFORM_GEOMETRY_REGION_H_
 
 #include "sky/engine/platform/PlatformExport.h"
 #include "sky/engine/platform/geometry/IntRect.h"
 #include "sky/engine/wtf/Vector.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT Region {
 public:
     Region();
@@ skipping 137 matching lines @@
     return a.m_spans == b.m_spans && a.m_segments == b.m_segments;
 }
 
 inline bool operator==(const Region::Span& a, const Region::Span& b)
 {
     return a.y == b.y && a.segmentIndex == b.segmentIndex;
 }
 
 } // namespace blink
 
-#endif // Region_h
+#endif  // SKY_ENGINE_PLATFORM_GEOMETRY_REGION_H_