Fix sky include guards to match Chromium style

sky/engine/core/events/MouseRelatedEvent.h

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.
  *
  * 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 MouseRelatedEvent_h
-#define MouseRelatedEvent_h
+#ifndef SKY_ENGINE_CORE_EVENTS_MOUSERELATEDEVENT_H_
+#define SKY_ENGINE_CORE_EVENTS_MOUSERELATEDEVENT_H_
 
 #include "sky/engine/core/events/UIEventWithKeyState.h"
 #include "sky/engine/platform/geometry/LayoutPoint.h"
 
 namespace blink {
 
     // Internal only: Helper class for what's common between mouse and wheel events.
     class MouseRelatedEvent : public UIEventWithKeyState {
     public:
         int screenX() const { return m_screenLocation.x(); }
@@ skipping 45 matching lines @@
         LayoutPoint m_pageLocation;
         LayoutPoint m_layerLocation;
         LayoutPoint m_offsetLocation;
         LayoutPoint m_absoluteLocation;
         bool m_isSimulated;
         bool m_hasCachedRelativePosition;
     };
 
 } // namespace blink
 
-#endif // MouseRelatedEvent_h
+#endif  // SKY_ENGINE_CORE_EVENTS_MOUSERELATEDEVENT_H_