Enable module scripts in ScriptLoader

third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp

Index: third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
diff --git a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
index 8b0333862476cec082761daa0de4bb30b8d60ee0..ac3ac3960489ca0fb3f186ef3c65d6aec7de4eba 100644
--- a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -1118,6 +1118,9 @@ void XMLDocumentParser::EndElementNs() {
     // FIXME: Script execution should be shared between
     // the libxml2 and Qt XMLDocumentParser implementations.
 
+    // XMLDocumentParser does not support module scripts.
+    CHECK_EQ(script_loader->GetScriptType(), ScriptType::kClassic);
+
     if (script_loader->ReadyToBeParserExecuted()) {
       if (!script_loader->ExecuteScript(ClassicScript::Create(ScriptSourceCode(
               script_loader->ScriptContent(), GetDocument()->Url(),