Rename WebCore namespace to blink in Public

public/web/WebPerformance.h

Index: public/web/WebPerformance.h
diff --git a/public/web/WebPerformance.h b/public/web/WebPerformance.h
index a858f352240b76effc8d69618a58fd03d936067d..48d17123188af1d23a34c545e283abac5e4a217d 100644
--- a/public/web/WebPerformance.h
+++ b/public/web/WebPerformance.h
@@ -39,7 +39,7 @@
 #include "platform/heap/Handle.h"
 #endif
 
-namespace WebCore { class Performance; }
+namespace blink { class Performance; }
 
 namespace blink {
 
@@ -86,12 +86,12 @@ public:
     BLINK_EXPORT double loadEventEnd() const;
 
 #if BLINK_IMPLEMENTATION
-    WebPerformance(const PassRefPtrWillBeRawPtr<WebCore::Performance>&);
-    WebPerformance& operator=(const PassRefPtrWillBeRawPtr<WebCore::Performance>&);
+    WebPerformance(const PassRefPtrWillBeRawPtr<blink::Performance>&);
+    WebPerformance& operator=(const PassRefPtrWillBeRawPtr<blink::Performance>&);
 #endif
 
 private:
-    WebPrivatePtr<WebCore::Performance> m_private;
+    WebPrivatePtr<blink::Performance> m_private;
 };
 
 } // namespace blink