Use data driven code when registering constructors.

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

 {% from "macros.tmpl" import license -%}
 {{ license() }}
 
 #include "config.h"
 #include "{{namespace}}ElementFactory.h"
 
 #include "RuntimeEnabledFeatures.h"
 #include "{{namespace}}Names.h"
 {%- for tag in tags|sort %}
 #include "core/{{namespace|lower}}/{{tag.interface}}.h"
@@ skipping 40 matching lines @@
 {%- endif %}
     return {{tag.interface}}::create(
 {%- if tag.multipleTagNames -%} {{tag|symbol}}Tag, {% endif -%}
         document
 {%- if namespace == 'HTML' and tag.constructorNeedsFormElement %}, formElement{% endif -%}
 {%- if tag.constructorNeedsCreatedByParser %}, createdByParser{% endif -%}
     );
 }
 {%- endfor %}
 
-static void addTag(const QualifiedName& tag, ConstructorFunction func)
-{
-    g_constructors->set(tag.localName(), func);
-}
+struct Create{{namespace}}FunctionMapData {
+  const QualifiedName& tag;
+  ConstructorFunction func;
+};
 
-static void createFunctionMap()
+static void create{{namespace}}FunctionMap()
 {
     ASSERT(!g_constructors);
     g_constructors = new FunctionMap;
+    static const Create{{namespace}}FunctionMapData data[] = {
 {%- for tag in tags|sort if not tag.noConstructor %}
-    addTag({{tag|symbol}}Tag, {{tag|symbol}}Constructor);
+        { {{tag|symbol}}Tag, {{tag|symbol}}Constructor },
 {%- endfor %}
+    };
+    for (size_t i = 0; i < WTF_ARRAY_LENGTH(data); i++)
+        g_constructors->set(data[i].tag.localName(), data[i].func);
 }
 
 PassRefPtr<{{namespace}}Element> {{namespace}}ElementFactory::create{{namespace}}Element(
     const AtomicString& localName,
     Document& document,
 {%- if namespace == 'HTML' %}
     HTMLFormElement* formElement,
 {%- endif %}
     bool createdByParser)
 {
     if (!g_constructors)
-        createFunctionMap();
+        create{{namespace}}FunctionMap();
     if (ConstructorFunction function = g_constructors->get(localName))
         return function(document, {%- if namespace == 'HTML' %}formElement,{% endif %} createdByParser);
 
     if (document.registrationContext() && CustomElement::isValidName(localName)) {
         RefPtr<Element> element = document.registrationContext()->createCustomTagElement(document, QualifiedName(nullAtom, localName, {{namespace_prefix}}NamespaceURI));
         ASSERT_WITH_SECURITY_IMPLICATION(element->is{{namespace}}Element());
         return static_pointer_cast<{{namespace}}Element>(element.release());
     }
 
     return {{fallback_interface}}::create(QualifiedName(nullAtom, localName, {{namespace_prefix}}NamespaceURI), document);
 }
 
 } // namespace WebCore