bindings: Add validation for enum Sequence or Array

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 bc3da71fedf5c3bfda2365053f4691e8627bb47d..0d6bac9a3aa4bbe048def64f608350a30824d11e 100644
--- a/Source/bindings/templates/attributes.cpp
+++ b/Source/bindings/templates/attributes.cpp
@@ -1,4 +1,4 @@
-{% from 'conversions.cpp' import v8_value_to_local_cpp_value %}
+{% from 'conversions.cpp' import declare_enum_validation_variable, v8_value_to_local_cpp_value %}
 
 
 {##############################################################################}
@@ -330,12 +330,12 @@ v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info
         exceptionState.throwIfNeeded();
         return;
     }
-    {% elif attribute.enum_validation_expression %}
+    {% elif attribute.enum_values %}
     {# Setter ignores invalid enum values:
        http://www.w3.org/TR/WebIDL/#idl-enums #}
-    String string = cppValue;
-    if (!({{attribute.enum_validation_expression}})) {
-        currentExecutionContext(info.GetIsolate())->addConsoleMessage(ConsoleMessage::create(JSMessageSource, WarningMessageLevel, "The provided value '" + string + "' is not a valid value of type '{{attribute.idl_type}}'."));
+    {{declare_enum_validation_variable(attribute.enum_values) | indent}}
+    if (!isValidEnum(cppValue, validValues, WTF_ARRAY_LENGTH(validValues))) {
+        currentExecutionContext(info.GetIsolate())->addConsoleMessage(ConsoleMessage::create(JSMessageSource, WarningMessageLevel, "The provided value '" + toCoreString(info.GetIsolate(), v8Value) + "' is not a valid value of type '{{attribute.idl_type}}'."));
         return;
     }
     {% endif %}