Rename WebCore namespace to blink in Platform

Source/platform/graphics/GraphicsContextCullSaver.h

 #ifndef GraphicsContextCullSaver_h
 #define GraphicsContextCullSaver_h
 
 #include "platform/graphics/GraphicsContext.h"
 
-namespace WebCore {
+namespace blink {
 
 class FloatRect;
 
 class GraphicsContextCullSaver {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     GraphicsContextCullSaver(GraphicsContext& context)
         : m_context(context)
         , m_cullApplied(false)
     {
@@ skipping 17 matching lines @@
         ASSERT(!m_cullApplied);
         m_context.beginCull(rect);
         m_cullApplied = true;
     }
 
 private:
     GraphicsContext& m_context;
     bool m_cullApplied;
 };
 
-} // namespace WebCore
+} // namespace blink
 
 #endif // GraphicsContextCullSaver_h