Clean up remaining uses of WebCore namespace

Source/core/dom/DOMPoint.h

Index: Source/core/dom/DOMPoint.h
diff --git a/Source/core/dom/DOMPoint.h b/Source/core/dom/DOMPoint.h
index dcfaac253ab2bfa5ec8d2a3f0ae3398bf10e95ae..11d53ebacc7cdaf8e064d141cd785c4d116a7abb 100644
--- a/Source/core/dom/DOMPoint.h
+++ b/Source/core/dom/DOMPoint.h
@@ -8,7 +8,7 @@
 #include "bindings/core/v8/Dictionary.h"
 #include "core/dom/DOMPointReadOnly.h"
 
-namespace WebCore {
+namespace blink {
 
 class DOMPoint FINAL : public DOMPointReadOnly {
 public:
@@ -24,6 +24,6 @@ protected:
     DOMPoint(double x, double y, double z, double w);
 };
 
-} // namespace WebCore
+} // namespace blink
 
 #endif