Stop using WebCore namespace in generated code

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

 {% from "macros.tmpl" import license %}
 {{ license() }}
 
 #ifndef {{namespace}}ElementTypeHelpers_h
 #define {{namespace}}ElementTypeHelpers_h
 
 #include "core/dom/ContextFeatures.h"
 #include "core/dom/Element.h"
 #include "{{namespace}}Names.h"
 #include "platform/RuntimeEnabledFeatures.h"
 
-namespace WebCore {
+namespace blink {
 // Type checking.
 {% for tag in tags|sort if not tag.multipleTagNames and not tag.noTypeHelpers %}
 {% filter enable_conditional(tag.Conditional) %}
 class {{tag.interface}};
 void is{{tag.interface}}(const {{tag.interface}}&); // Catch unnecessary runtime check of type known at compile time.
 void is{{tag.interface}}(const {{tag.interface}}*); // Catch unnecessary runtime check of type known at compile time.
 
 inline bool is{{tag.interface}}(const {{namespace}}Element& element) {
     {% if tag.contextConditional %}
     if (!ContextFeatures::{{tag.contextConditional}}Enabled(&element.document()))
@@ skipping 13 matching lines @@
 template <> inline bool isElementOfType<const {{tag.interface}}>(const Node& node) { return is{{tag.interface}}(node); }
 template <> inline bool isElementOfType<const {{tag.interface}}>(const {{namespace}}Element& element) { return is{{tag.interface}}(element); }
 {% endfilter %}
 
 {% endfor %}
 // Using macros because the types are forward-declared and we don't want to use reinterpret_cast in the
 // casting functions above. reinterpret_cast would be unsafe due to multiple inheritence.
 
 {% for tag in tags|sort if not tag.multipleTagNames and not tag.noTypeHelpers %}
 {% filter enable_conditional(tag.Conditional) %}
-#define to{{tag.interface}}(x) WebCore::toElement<WebCore::{{tag.interface}}>(x)
+#define to{{tag.interface}}(x) blink::toElement<blink::{{tag.interface}}>(x)
 {% endfilter %}
 {% endfor %}
-} // WebCore
+} // namespace blink
 
 #endif