Fix sky include guards to match Chromium style

sky/engine/platform/PlatformTouchEvent.h

 /*
     Copyright (C) 2009 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 PlatformTouchEvent_h
-#define PlatformTouchEvent_h
+#ifndef SKY_ENGINE_PLATFORM_PLATFORMTOUCHEVENT_H_
+#define SKY_ENGINE_PLATFORM_PLATFORMTOUCHEVENT_H_
 
 #include "sky/engine/platform/PlatformEvent.h"
 #include "sky/engine/platform/PlatformTouchPoint.h"
 #include "sky/engine/wtf/Vector.h"
 
 namespace blink {
 
 class PlatformTouchEvent : public PlatformEvent {
 public:
     PlatformTouchEvent()
         : PlatformEvent(PlatformEvent::TouchStart)
         , m_cancelable(true)
     {
     }
 
     const Vector<PlatformTouchPoint>& touchPoints() const { return m_touchPoints; }
 
     bool cancelable() const { return m_cancelable; }
 
 protected:
     Vector<PlatformTouchPoint> m_touchPoints;
     bool m_cancelable;
 };
 
 }
 
-#endif // PlatformTouchEvent_h
+#endif  // SKY_ENGINE_PLATFORM_PLATFORMTOUCHEVENT_H_