Fixed handling of Dart MIME type

Source/core/dom/ScriptLoader.h

Index: Source/core/dom/ScriptLoader.h
diff --git a/Source/core/dom/ScriptLoader.h b/Source/core/dom/ScriptLoader.h
index 3b1d379d46bb636dc615ee99af4a903f634ff143..6367afd8342e05856d551b91cf214f7de6f871f5 100644
--- a/Source/core/dom/ScriptLoader.h
+++ b/Source/core/dom/ScriptLoader.h
@@ -61,8 +61,8 @@ public:
     // XML parser calls these
     void dispatchLoadEvent();
     void dispatchErrorEvent();
-    enum ScriptType { ScriptNone = 0, ScriptJavaScript, ScriptDart };
-    ScriptType isScriptTypeSupported(LegacyTypeSupport) const;
+
+    bool isScriptTypeSupported(LegacyTypeSupport) const;
 
     bool haveFiredLoadEvent() const { return m_haveFiredLoad; }
     bool willBeParserExecuted() const { return m_willBeParserExecuted; }
@@ -118,6 +118,10 @@ private:
     bool m_willExecuteWhenDocumentFinishedParsing : 1;
     bool m_forceAsync : 1;
     bool m_willExecuteInOrder : 1;
+
+    // FIXMEDART: Type of script (JS, Dart, None).
+    enum ScriptType { ScriptNone = 0, ScriptJavaScript, ScriptDart };
+    ScriptType getScriptTypeSupported(LegacyTypeSupport) const;
     ScriptType m_scriptType;
 };