Tidy up error reporting for calling-constructor-as-function.

Source/bindings/templates/interface.cpp

 {% extends 'interface_base.cpp' %}
 
 
 {##############################################################################}
 {% macro attribute_configuration(attribute) %}
 {% set getter_callback =
        '%sV8Internal::%sAttributeGetterCallback' %
             (cpp_class, attribute.name)
        if not attribute.constructor_type else
        ('%sV8Internal::%sConstructorGetterCallback' %
@@ skipping 802 matching lines @@
 {##############################################################################}
 {% block constructor_callback %}
 {% if constructors or has_custom_constructor or has_event_constructor %}
 void {{v8_class}}::constructorCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SCOPED_SAMPLING_STATE("Blink", "DOMConstructor");
     {% if measure_as %}
     UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::{{measure_as}});
     {% endif %}
     if (!info.IsConstructCall()) {
-        throwTypeError(ExceptionMessages::failedToConstruct("{{interface_name}}", "Please use the 'new' operator, this DOM object constructor cannot be called as a function."), info.GetIsolate());
+        throwTypeError(ExceptionMessages::constructorNotCallableAsFunction("{{interface_name}}"), info.GetIsolate());
         return;
     }
 
     if (ConstructorMode::current() == ConstructorMode::WrapExistingObject) {
         v8SetReturnValue(info, info.Holder());
         return;
     }
 
     {% if has_custom_constructor %}
     {{v8_class}}::constructorCustom(info);
@@ skipping 481 matching lines @@
 {% endfilter %}
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline({{cpp_class}}* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 {% endblock %}