Support deprecation + use counters for constructor attributes.

Source/bindings/templates/attributes.cpp

 {##############################################################################}
 {% macro attribute_getter(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeGetter{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 const v8::PropertyCallbackInfo<v8::Value>& info
 {%- endif %})
 {
@@ skipping 164 matching lines @@
     {% if attribute.has_custom_getter %}
     {{v8_class}}::{{attribute.name}}AttributeGetterCustom(info);
     {% else %}
     {{cpp_class}}V8Internal::{{attribute.name}}AttributeGetter{{world_suffix}}(info);
     {% endif %}
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 {% 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) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeSetter{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 v8::Local<v8::Value> jsValue, const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info
 {%- endif %})
@@ skipping 101 matching lines @@
     {% endif %}
     {% if attribute.has_custom_setter %}
     {{v8_class}}::{{attribute.name}}AttributeSetterCustom(jsValue, info);
     {% else %}
     {{cpp_class}}V8Internal::{{attribute.name}}AttributeSetter{{world_suffix}}(jsValue, info);
     {% endif %}
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 {% endfilter %}
 {% endmacro %}