Fix sky include guards to match Chromium style

sky/engine/core/rendering/RenderObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * 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 RenderObject_h
-#define RenderObject_h
+#ifndef SKY_ENGINE_CORE_RENDERING_RENDEROBJECT_H_
+#define SKY_ENGINE_CORE_RENDERING_RENDEROBJECT_H_
 
 #include "sky/engine/core/dom/Document.h"
 #include "sky/engine/core/dom/DocumentLifecycle.h"
 #include "sky/engine/core/dom/Element.h"
 #include "sky/engine/core/editing/TextAffinity.h"
 #include "sky/engine/core/fetch/ImageResourceClient.h"
 #include "sky/engine/core/html/HTMLElement.h"
 #include "sky/engine/core/rendering/HitTestRequest.h"
 #include "sky/engine/core/rendering/PaintInvalidationState.h"
 #include "sky/engine/core/rendering/PaintPhase.h"
@@ skipping 1167 matching lines @@
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::RenderObject*);
 void showLineTree(const blink::RenderObject*);
 void showRenderTree(const blink::RenderObject* object1);
 // We don't make object2 an optional parameter so that showRenderTree
 // can be called from gdb easily.
 void showRenderTree(const blink::RenderObject* object1, const blink::RenderObject* object2);
 
 #endif
 
-#endif // RenderObject_h
+#endif  // SKY_ENGINE_CORE_RENDERING_RENDEROBJECT_H_