Fix sky include guards to match Chromium style

sky/engine/core/css/parser/MediaQueryInputStream.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MediaQueryInputStream_h
-#define MediaQueryInputStream_h
+#ifndef SKY_ENGINE_CORE_CSS_PARSER_MEDIAQUERYINPUTSTREAM_H_
+#define SKY_ENGINE_CORE_CSS_PARSER_MEDIAQUERYINPUTSTREAM_H_
 
 #include "sky/engine/wtf/text/WTFString.h"
 
 namespace blink {
 
 class MediaQueryInputStream {
     WTF_MAKE_NONCOPYABLE(MediaQueryInputStream);
     WTF_MAKE_FAST_ALLOCATED;
 public:
     MediaQueryInputStream(String input);
@@ skipping 29 matching lines @@
         return offset;
     }
 
 private:
     size_t m_offset;
     String m_string;
 };
 
 } // namespace blink
 
-#endif // MediaQueryInputStream_h
+#endif  // SKY_ENGINE_CORE_CSS_PARSER_MEDIAQUERYINPUTSTREAM_H_