Add support in generate scripts to handle Conditional

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 17 matching lines @@
     {% if namespace == 'HTML' %}
     HTMLFormElement*,
     {% endif %}
     bool createdByParser);
 
 typedef HashMap<AtomicString, ConstructorFunction> FunctionMap;
 
 static FunctionMap* g_constructors = 0;
 
 {% for tag in tags|sort if not tag.noConstructor %}
+{% filter enable_conditional(tag.Conditional) %}
 static PassRefPtrWillBeRawPtr<{{namespace}}Element> {{tag|symbol}}Constructor(
     Document& document,
     {% if namespace == 'HTML' %}
     HTMLFormElement* formElement,
     {% endif %}
     bool createdByParser)
 {
     {% if tag.contextConditional %}
     if (!ContextFeatures::{{tag.contextConditional}}Enabled(&document))
         return {{fallback_interface}}::create({{tag|symbol}}Tag, document);
     {% endif %}
     {% if tag.runtimeEnabled %}
     if (!RuntimeEnabledFeatures::{{tag.runtimeEnabled}}Enabled())
         return {{fallback_interface}}::create({{tag|symbol}}Tag, document);
     {% 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 -%}
     );
 }
+{% endfilter %}
 {% endfor %}
 
 struct Create{{namespace}}FunctionMapData {
   const QualifiedName& tag;
   ConstructorFunction func;
 };
 
 static void create{{namespace}}FunctionMap()
 {
     ASSERT(!g_constructors);
     g_constructors = new FunctionMap;
+    // Empty array initializer lists are illegal [dcl.init.aggr] and will not
+    // compile in MSVC. If tags list is empty, add check to skip this.
     static const Create{{namespace}}FunctionMapData data[] = {
     {% for tag in tags|sort if not tag.noConstructor %}
+    {% filter enable_conditional(tag.Conditional) %}
         { {{tag|symbol}}Tag, {{tag|symbol}}Constructor },
+    {% endfilter %}
     {% endfor %}
     };
     for (size_t i = 0; i < WTF_ARRAY_LENGTH(data); i++)
         g_constructors->set(data[i].tag.localName(), data[i].func);
 }
 
 PassRefPtrWillBeRawPtr<{{namespace}}Element> {{namespace}}ElementFactory::create{{namespace}}Element(
     const AtomicString& localName,
     Document& document,
     {% if namespace == 'HTML' %}
     HTMLFormElement* formElement,
     {% endif %}
     bool createdByParser)
 {
     if (!g_constructors)
         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)) {
         RefPtrWillBeRawPtr<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