Stop using WebCore namespace in generated code

Source/build/scripts/templates/ElementFactory.h.tmpl

 {% from "macros.tmpl" import license %}
 {{ license() }}
 
 #ifndef {{namespace}}ElementFactory_h
 #define {{namespace}}ElementFactory_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 
-namespace WebCore {
+namespace blink {
 
 class Document;
 class {{namespace}}Element;
 {% if namespace == 'HTML' %}
 class HTMLFormElement;
 {% endif %}
 
 class {{namespace}}ElementFactory {
 public:
     static PassRefPtrWillBeRawPtr<{{namespace}}Element> create{{namespace}}Element(
         const AtomicString& localName,
         Document&,
         {% if namespace == 'HTML' %}
         HTMLFormElement* = 0,
         {% endif %}
         bool createdByParser = true);
 };
 
-} // WebCore
+} // namespace blink
 
 #endif