Model each Dart library as its own ScriptState when devtools are enabled.

Source/bindings/v8/ScriptState.h

 /*
  * Copyright (C) 2008, 2009, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ScriptState_h
 #define ScriptState_h
 
 #include "bindings/v8/ScopedPersistent.h"
 #include "bindings/v8/V8Utilities.h"
 #include <v8.h>
 #include "wtf/Noncopyable.h"
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class DOMWindow;
 class DOMWrapperWorld;
 class Frame;
 class ScriptExecutionContext;
 class WorkerGlobalScope;
 
 class ScriptState {
@@ skipping 15 matching lines @@
     v8::Isolate* isolate()
     {
         return m_isolate;
     }
 
     DOMWindow* domWindow() const;
     ScriptExecutionContext* scriptExecutionContext() const;
     bool evalEnabled() const;
     void setEvalEnabled(bool);
 
+    virtual const String* name() { return 0; }
+    // FIXME: determine a better name and use an enum of supported languages, etc.
+    virtual bool isJavaScript() { return true; }
+
     static ScriptState* forContext(v8::Handle<v8::Context>);
     static ScriptState* current();
 
 protected:
     ScriptState()
         : m_isolate(v8::Isolate::GetCurrent())
     {
     }
 
-    ~ScriptState();
+    explicit ScriptState(v8::Handle<v8::Context>);
+
+    virtual ~ScriptState();
 
 private:
     friend ScriptState* mainWorldScriptState(Frame*);
-    explicit ScriptState(v8::Handle<v8::Context>);
 
     static void makeWeakCallback(v8::Isolate*, v8::Persistent<v8::Context>*, ScriptState*);
 
     ScopedPersistent<v8::Value> m_exception;
     ScopedPersistent<v8::Context> m_context;
     v8::Isolate* m_isolate;
 };
 
 class EmptyScriptState : public ScriptState {
 public:
@@ skipping 24 matching lines @@
     ScopedPersistent<v8::Context> m_context;
 };
 
 ScriptState* mainWorldScriptState(Frame*);
 
 ScriptState* scriptStateFromWorkerGlobalScope(WorkerGlobalScope*);
 
 }
 
 #endif // ScriptState_h