Rename WebCore namespace to blink in Platform

Source/platform/exported/WebScrollbarImpl.h

Index: Source/platform/exported/WebScrollbarImpl.h
diff --git a/Source/platform/exported/WebScrollbarImpl.h b/Source/platform/exported/WebScrollbarImpl.h
index 64fceb1542f917e154251fcb69679dd6fd4a1e20..97a8cadffcd267487610e8042b0225ec698f959e 100644
--- a/Source/platform/exported/WebScrollbarImpl.h
+++ b/Source/platform/exported/WebScrollbarImpl.h
@@ -28,7 +28,7 @@
 #include "platform/PlatformExport.h"
 #include "public/platform/WebScrollbar.h"
 
-namespace WebCore {
+namespace blink {
 class Scrollbar;
 }
 
@@ -36,7 +36,7 @@ namespace blink {
 
 class PLATFORM_EXPORT WebScrollbarImpl : public WebScrollbar {
 public:
-    explicit WebScrollbarImpl(WebCore::Scrollbar*);
+    explicit WebScrollbarImpl(blink::Scrollbar*);
 
     // Implement blink::WebScrollbar methods
     virtual bool isOverlay() const OVERRIDE;
@@ -60,7 +60,7 @@ public:
     virtual void setIsAlphaLocked(bool) OVERRIDE;
 
 private:
-    RefPtr<WebCore::Scrollbar> m_scrollbar;
+    RefPtr<blink::Scrollbar> m_scrollbar;
 };
 
 } // namespace blink