Fix sky include guards to match Chromium style

sky/engine/platform/text/TextRunIterator.h

 // Copyright (C) 2013 Google Inc. All rights reserved.
 //
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 // 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
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 // 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
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-#ifndef TextRunIterator_h
-#define TextRunIterator_h
+#ifndef SKY_ENGINE_PLATFORM_TEXT_TEXTRUNITERATOR_H_
+#define SKY_ENGINE_PLATFORM_TEXT_TEXTRUNITERATOR_H_
 
 #include "sky/engine/platform/text/TextRun.h"
 
 namespace blink {
 
 class TextRunIterator {
 public:
     TextRunIterator()
         : m_textRun(0)
         , m_offset(0)
@@ skipping 27 matching lines @@
     bool operator!=(const TextRunIterator& other) { return !operator==(other); }
 
 private:
     const TextRun* m_textRun;
     int m_offset;
 };
 
 
 } // namespace blink
 
-#endif // TextRunIterator_h
+#endif  // SKY_ENGINE_PLATFORM_TEXT_TEXTRUNITERATOR_H_