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

third_party/WebKit/Source/core/loader/modulescript/ModuleScriptLoader.cpp

 // Copyright 2017 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.
 
 #include "core/loader/modulescript/ModuleScriptLoader.h"
 
 #include "core/dom/Modulator.h"
 #include "core/dom/ModuleScript.h"
 #include "core/loader/modulescript/ModuleScriptLoaderClient.h"
 #include "core/loader/modulescript/ModuleScriptLoaderRegistry.h"
@@ skipping 160 matching lines @@
     return false;
   }
 
   // The result of extracting a MIME type from response's header list
   // (ignoring parameters) is not a JavaScript MIME type
   // Note: For historical reasons, fetching a classic script does not include
   // MIME type checking. In contrast, module scripts will fail to load if they
   // are not of a correct MIME type.
   // We use ResourceResponse::httpContentType() instead of mimeType(), as
   // mimeType() may be rewritten by mime sniffer.
-  if (!MIMETypeRegistry::IsSupportedJavaScriptMIMEType(
-          response.HttpContentType()))
-    return false;
+  // if (!MIMETypeRegistry::IsSupportedJavaScriptMIMEType(
+  //        response.HttpContentType()))
+  //  return false;
 
   return true;
 }
 
 // ScriptResourceClient callback handler
 void ModuleScriptLoader::NotifyFinished(Resource*) {
   // Note: "conditions" referred in Step 7 is implemented in
   // wasModuleLoadSuccessful().
   // Step 7. If any of the following conditions are met, set moduleMap[url] to
   // null, asynchronously complete this algorithm with null, and abort these
@@ skipping 56 matching lines @@
 
 DEFINE_TRACE(ModuleScriptLoader) {
   visitor->Trace(modulator_);
   visitor->Trace(module_script_);
   visitor->Trace(registry_);
   visitor->Trace(client_);
   ResourceOwner<ScriptResource>::Trace(visitor);
 }
 
 }  // namespace blink