[WIP Prototype] ES6 https://html.spec.whatwg.org/#fetch-a-single-module-script implementation

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..4f92958baa85bb25ff600255cd92077d09f1751b 100644
--- a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -1112,9 +1112,14 @@ void XMLDocumentParser::EndElementNs() {
   DCHECK(!pending_script_);
   requesting_script_ = true;
 
-  if (script_loader->PrepareScript(
-          script_start_position_,
-          ScriptLoader::kAllowLegacyTypeInTypeAttribute)) {
+  bool success = script_loader->PrepareScript(
+      script_start_position_, ScriptLoader::kAllowLegacyTypeInTypeAttribute);
+
+  // XMLDocumentParser does not support module scripts.
+  // FOXME: (how) should we handle this? Should we fail more gracefully?
+  CHECK_EQ(script_loader->GetScriptType(), ScriptType::kClassic);
+
+  if (success) {
     // FIXME: Script execution should be shared between
     // the libxml2 and Qt XMLDocumentParser implementations.