MakeQualifiedNames should generate lazily created arrays for attributes and tags.

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

 {% from "macros.tmpl" import license -%}
 {{ license() }}
 
 #ifndef {{namespace}}Names_h
 #define {{namespace}}Names_h
 
 #include "core/dom/QualifiedName.h"
 
 namespace WebCore {
 namespace {{namespace}}Names {
 
 #ifndef {{namespace|to_macro_style}}_NAMES_HIDE_GLOBALS
 // Namespace
 extern const WTF::AtomicString {{namespace_prefix}}NamespaceURI;
 
 // Tags
 {%- for tag in tags|sort %}
 extern const WebCore::QualifiedName {{tag|symbol}}Tag;
 {%- endfor %}
 
 // Attributes
 {%- for attr in attrs|sort %}
 extern const WebCore::QualifiedName {{attr|symbol}}Attr;
 {%- endfor %}
 
 #endif // {{namespace|to_macro_style}}_NAMES_HIDE_GLOBALS
 
 {%- if tags %}
 const unsigned {{namespace}}TagsCount = {{tags|count}};
-const WebCore::QualifiedName* const* get{{namespace}}Tags();
+void get{{namespace}}Tags(WebCore::QualifiedName* tags[], unsigned length);

[Inactive, 2014/01/15 19:27:02]

Passing the length here is a bit odd. Maybe, we can keep
"get{{namespace}}Tags()" as prototype and return a PassOwnPtr<const
QualifiedName*[]> ?

 {%- endif %}
 const unsigned {{namespace}}AttrsCount = {{attrs|count}};
-const WebCore::QualifiedName* const* get{{namespace}}Attrs();
+void get{{namespace}}Attrs(WebCore::QualifiedName* attributes[], unsigned length);
 
 void init();
 
 } // {{namespace}}Names
 } // WebCore
 
 #endif