Rename WebCore namespace to blink in Platform

Source/platform/scroll/Scrollbar.h

 /*
  * Copyright (C) 2004, 2006 Apple Computer, 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #ifndef Scrollbar_h
 #define Scrollbar_h
 
 #include "platform/Timer.h"
 #include "platform/Widget.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/scroll/ScrollbarThemeClient.h"
 #include "wtf/MathExtras.h"
 #include "wtf/PassRefPtr.h"
 
-namespace WebCore {
+namespace blink {
 
 class GraphicsContext;
 class IntRect;
 class PlatformGestureEvent;
 class PlatformMouseEvent;
 class ScrollableArea;
 class ScrollbarTheme;
 class ScrollView;
 
 class PLATFORM_EXPORT Scrollbar : public Widget,
@@ skipping 144 matching lines @@
     bool m_isAlphaLocked;
 
 private:
     virtual bool isScrollbar() const OVERRIDE { return true; }
 
     float scrollableAreaCurrentPos() const;
 };
 
 DEFINE_TYPE_CASTS(Scrollbar, Widget, widget, widget->isScrollbar(), widget.isScrollbar());
 
-} // namespace WebCore
+} // namespace blink
 
 #endif // Scrollbar_h