Add Dart MIME type to mimeTypeAllowedByNosniff

Source/core/fetch/ScriptResource.cpp

Index: Source/core/fetch/ScriptResource.cpp
diff --git a/Source/core/fetch/ScriptResource.cpp b/Source/core/fetch/ScriptResource.cpp
index 347de8c64735c7c9973b08253083e3c32f3f3d9b..bc087839d5c015a7fec32d564a60e29d7a2be67c 100644
--- a/Source/core/fetch/ScriptResource.cpp
+++ b/Source/core/fetch/ScriptResource.cpp
@@ -97,7 +97,10 @@ const String& ScriptResource::script()
 
 bool ScriptResource::mimeTypeAllowedByNosniff() const
 {
-    return parseContentTypeOptionsHeader(m_response.httpHeaderField("X-Content-Type-Options")) != ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType());
+    // FIXMEDART: Added for Dart MIME type support.
+    return parseContentTypeOptionsHeader(m_response.httpHeaderField("X-Content-Type-Options")) != ContentTypeOptionsNosniff
+        || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType())
+        || MIMETypeRegistry::isSupportedDartMIMEType(mimeType());
 }
 
 } // namespace blink