Implement ImageData constructors.

Source/bindings/templates/methods.cpp

Index: Source/bindings/templates/methods.cpp
diff --git a/Source/bindings/templates/methods.cpp b/Source/bindings/templates/methods.cpp
index 8abf31b557d81605c1a586b54e305818044058d1..390376045eaa36992d4234ce99708cdb775cf917 100644
--- a/Source/bindings/templates/methods.cpp
+++ b/Source/bindings/templates/methods.cpp
@@ -386,16 +386,23 @@ static void constructor{{constructor.overload_index}}(const v8::FunctionCallback
     Document& document = *toDocument(currentExecutionContext(info.GetIsolate()));
     {% endif %}
     {{ref_ptr}}<{{cpp_class}}> impl = {{cpp_class}}::create({{constructor.argument_list | join(', ')}});
-    v8::Handle<v8::Object> wrapper = info.Holder();
     {% if is_constructor_raises_exception %}
     if (exceptionState.throwIfNeeded())
         return;
     {% endif %}
 
-    {# FIXME: Should probably be Independent unless [ActiveDOMObject]
-              or [DependentLifetime]. #}
-    V8DOMWrapper::associateObjectWithWrapper<{{v8_class}}>(impl.release(), &{{v8_class}}::wrapperTypeInfo, wrapper, info.GetIsolate(), WrapperConfiguration::Dependent);
+    {% if has_custom_wrap %}
+    v8SetReturnValue(info, wrap(impl.get(), info.Holder(), info.GetIsolate()));
+    {% else %}
+    v8::Handle<v8::Object> wrapper = info.Holder();
+    {% set wrapper_configuration = 'WrapperConfiguration::Dependent'

[Nils Barth (inactive), 2014/03/24 02:14:20]

Since we're using {{wrapper_configuration}} two places,
could you factor it out into the interface context display
in v8_interface.py?

Also, can you check the 2 other uses of
WrapperConfiguration::Dependent
...and see if we can replace these with {{wrapper_configuration}}?

Thanks!

+                                   if (has_visit_dom_wrapper or
+                                       is_active_dom_object or
+                                       is_dependent_lifetime) else
+                                   'WrapperConfiguration::Independent' %}
+    V8DOMWrapper::associateObjectWithWrapper<{{v8_class}}>(impl.release(), &{{v8_class}}::wrapperTypeInfo, wrapper, info.GetIsolate(), {{wrapper_configuration}});
     v8SetReturnValue(info, wrapper);
+    {% endif %}
 }
 {% endmacro %}