Fix sky include guards to match Chromium style

sky/engine/platform/fonts/harfbuzz/HarfBuzzFace.h

 /*
  * Copyright (c) 2012 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
@@ skipping 10 matching lines @@
  * 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
  * 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 HarfBuzzFace_h
-#define HarfBuzzFace_h
+#ifndef SKY_ENGINE_PLATFORM_FONTS_HARFBUZZ_HARFBUZZFACE_H_
+#define SKY_ENGINE_PLATFORM_FONTS_HARFBUZZ_HARFBUZZFACE_H_
 
 #include <hb.h>
 
 #include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 #include "sky/engine/wtf/RefCounted.h"
 #include "sky/engine/wtf/RefPtr.h"
 
 namespace blink {
 
@@ skipping 22 matching lines @@
     FontPlatformData* m_platformData;
     uint64_t m_uniqueID;
     hb_face_t* m_face;
     WTF::HashMap<uint32_t, uint16_t>* m_glyphCacheForFaceCacheEntry;
 
     hb_script_t m_scriptForVerticalText;
 };
 
 } // namespace blink
 
-#endif // HarfBuzzFace_h
+#endif  // SKY_ENGINE_PLATFORM_FONTS_HARFBUZZ_HARFBUZZFACE_H_