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

Source/bindings/dart/DartScriptState.h

-// Copyright 2012, Google Inc.
+// Copyright 2013, 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
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //    * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef ThreadSafeDartIsolateWrapper_h
-#define ThreadSafeDartIsolateWrapper_h
+#ifndef DartScriptState_h
+#define DartScriptState_h
 
-#include "bindings/dart/DartIsolateDestructionObserver.h"
+#include "bindings/v8/ScriptState.h"
 
 #include <dart_api.h>
-#include <wtf/RefPtr.h>
-#include <wtf/ThreadSafeRefCounted.h>
 
 namespace WebCore {
 
-class ThreadSafeDartIsolateWrapper : public ThreadSafeRefCounted<ThreadSafeDartIsolateWrapper>, public DartIsolateDestructionObserver {
-    WTF_MAKE_NONCOPYABLE(ThreadSafeDartIsolateWrapper);
+class DartScriptState : public ScriptState {
+    WTF_MAKE_NONCOPYABLE(DartScriptState);
 public:
-    static PassRefPtr<ThreadSafeDartIsolateWrapper> create();
+    explicit DartScriptState(Dart_Isolate, intptr_t libraryId, v8::Handle<v8::Context>);
+
+    Dart_Isolate isolate() { return m_isolate; }
+    intptr_t libraryId() { return m_libraryId; }
+
+    virtual const String* name() { return &m_libraryUrl; }
+    virtual bool isJavaScript() { return false; }
 
 private:
-    ThreadSafeDartIsolateWrapper() { }
+    Dart_Isolate m_isolate;
+    intptr_t m_libraryId;
+    String m_libraryUrl;
 };
 
 }
 
-#endif // ThreadSafeDartIsolateWrapper_h
+#endif // DartScriptState_h