Add support in generate scripts to handle Conditional

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

Index: Source/build/scripts/templates/MakeNames.cpp.tmpl
diff --git a/Source/build/scripts/templates/MakeNames.cpp.tmpl b/Source/build/scripts/templates/MakeNames.cpp.tmpl
index f6a939c3fd5f0f042541c096f7128feef527e15b..42fbf9af12e52053d9fb2ce388926a5927566907 100644
--- a/Source/build/scripts/templates/MakeNames.cpp.tmpl
+++ b/Source/build/scripts/templates/MakeNames.cpp.tmpl
@@ -17,22 +17,28 @@ namespace {{namespace}}Names {
 using namespace WTF;
 
 {% for entry in entries|sort %}
+{% filter enable_conditional(entry.Conditional) %}
 {% if export %}
 DEFINE_GLOBAL(AtomicString, {{entry|symbol}}Storage)
 {{export}} const AtomicString& {{entry|symbol}} = *reinterpret_cast<const AtomicString*>(&{{entry|symbol}}Storage);
 {% else %}
 DEFINE_GLOBAL(AtomicString, {{entry|symbol}})
 {% endif %}
+{% endfilter %}
 {% endfor %}
 
 void init{{suffix}}()
 {
     {% for entry in entries|sort %}
+    {% filter enable_conditional(entry.Conditional) %}
     StringImpl* {{entry|symbol}}Impl = StringImpl::createStatic("{{entry|cpp_name}}", {{entry|cpp_name|length}}, {{entry|cpp_name|hash}});
+    {% endfilter %}
     {% endfor %}
 
     {% for entry in entries|sort %}
+    {% filter enable_conditional(entry.Conditional) %}
     new ((void*)&{{entry|symbol}}) AtomicString({{entry|symbol}}Impl);
+    {% endfilter %}
     {% endfor %}
 }