bindings: Add validation for enum Sequence or Array

Source/bindings/templates/union.cpp

+{% from 'conversions.cpp' import declare_enum_validation_variable %}
 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by {{code_generator}}. DO NOT MODIFY!
 
 #include "config.h"
 #include "{{header_filename}}"
 
 {% from 'conversions.cpp' import v8_value_to_local_cpp_value %}
@@ skipping 19 matching lines @@
 {% for member in container.members %}
 {{member.rvalue_cpp_type}} {{container.cpp_class}}::getAs{{member.type_name}}() const
 {
     ASSERT(is{{member.type_name}}());
     return m_{{member.cpp_name}};
 }
 
 void {{container.cpp_class}}::set{{member.type_name}}({{member.rvalue_cpp_type}} value)
 {
     ASSERT(isNull());
-    {% if member.enum_validation_expression %}
-    String string = value;
-    if (!({{member.enum_validation_expression}})) {
+    {% if member.enum_values %}
+    NonThrowableExceptionState exceptionState;
+    {{declare_enum_validation_variable(member.enum_values) | indent}}
+    if (!isValidEnum(value, validValues, WTF_ARRAY_LENGTH(validValues), exceptionState)) {
         ASSERT_NOT_REACHED();
         return;
     }
     {% endif %}
     m_{{member.cpp_name}} = value;
     m_type = {{member.specific_type_enum}};
 }
 
 {{container.cpp_class}} {{container.cpp_class}}::from{{member.type_name}}({{member.rvalue_cpp_type}} value)
 {
@@ skipping 76 matching lines @@
         {{v8_value_to_local_cpp_value(container.numeric_type) | indent(8)}}
         impl.set{{container.numeric_type.type_name}}(cppValue);
         return;
     }
 
     {% endif %}
     {% if container.string_type %}
     {# 16. String #}
     {
         {{v8_value_to_local_cpp_value(container.string_type) | indent(8)}}
-        {% if container.string_type.enum_validation_expression %}
-        String string = cppValue;
-        if (!({{container.string_type.enum_validation_expression}})) {
-            exceptionState.throwTypeError("'" + string + "' is not a valid enum value.");
+        {% if container.string_type.enum_values %}
+        {{declare_enum_validation_variable(container.string_type.enum_values) | indent(8)}}
+        if (!isValidEnum(cppValue, validValues, WTF_ARRAY_LENGTH(validValues), exceptionState))
             return;
-        }
         {% endif %}
         impl.set{{container.string_type.type_name}}(cppValue);
         return;
     }
 
     {# 17. Number (fallback) #}
     {% elif container.numeric_type %}
     {
         {{v8_value_to_local_cpp_value(container.numeric_type) | indent(8)}}
         impl.set{{container.numeric_type.type_name}}(cppValue);
@@ skipping 31 matching lines @@
 
 {{container.cpp_class}} NativeValueTraits<{{container.cpp_class}}>::nativeValue(v8::Isolate* isolate, v8::Local<v8::Value> value, ExceptionState& exceptionState)
 {
     {{container.cpp_class}} impl;
     V8{{container.cpp_class}}::toImpl(isolate, value, impl, exceptionState);
     return impl;
 }
 
 {% endfor %}
 } // namespace blink