Support deprecation + use counters for constructor attributes.

Source/bindings/templates/attributes.cpp

Index: Source/bindings/templates/attributes.cpp
diff --git a/Source/bindings/templates/attributes.cpp b/Source/bindings/templates/attributes.cpp
index 0cd34be6b84c5db36644981eb38a9f3fdd019a39..2dec5523cfd7951b39488b61fb10a70efff217d6 100644
--- a/Source/bindings/templates/attributes.cpp
+++ b/Source/bindings/templates/attributes.cpp
@@ -182,6 +182,24 @@ v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info
 {% endfilter %}
 {% endmacro %}
 
+{##############################################################################}
+{% macro attribute_constructor_callback(attribute, world_suffix) %}
+{% filter conditional(attribute.conditional_string) %}
+static void {{attribute.name}}ConstructorGetterCallback{{world_suffix}}(v8::Local<v8::String> name, const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
+    {% if attribute.deprecate_as %}
+    UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.deprecate_as}});
+    {% endif %}
+    {% if attribute.measure_as %}
+    UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::{{attribute.measure_as}});
+    {% endif %}
+    {{cpp_class}}V8Internal::{{cpp_class}}ConstructorGetter{{world_suffix}}(name, info);
+    TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
+}
+{% endfilter %}
+{% endmacro %}
+
 
 {##############################################################################}
 {% macro attribute_setter(attribute, world_suffix) %}