Fix sky include guards to match Chromium style

sky/engine/wtf/text/ASCIIFastPath.h

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
-#ifndef ASCIIFastPath_h
-#define ASCIIFastPath_h
+#ifndef SKY_ENGINE_WTF_TEXT_ASCIIFASTPATH_H_
+#define SKY_ENGINE_WTF_TEXT_ASCIIFASTPATH_H_
 
 #include <stdint.h>
 #include "sky/engine/wtf/Alignment.h"
 #include "sky/engine/wtf/CPU.h"
 #include "sky/engine/wtf/StdLibExtras.h"
 #include "sky/engine/wtf/unicode/Unicode.h"
 
 namespace WTF {
 
 // Assuming that a pointer is the size of a "machine word", then
@@ skipping 93 matching lines @@
 #else
     for (size_t i = 0; i < length; ++i) {
         ASSERT(!(source[i] & 0xff00));
         destination[i] = static_cast<LChar>(source[i]);
     }
 #endif
 }
 
 } // namespace WTF
 
-#endif // ASCIIFastPath_h
+#endif  // SKY_ENGINE_WTF_TEXT_ASCIIFASTPATH_H_