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

Source/bindings/dart/DartScriptState.h

Index: Source/bindings/dart/DartScriptState.h
diff --git a/Source/bindings/dart/ThreadSafeDartIsolateWrapper.h b/Source/bindings/dart/DartScriptState.h
similarity index 72%
copy from Source/bindings/dart/ThreadSafeDartIsolateWrapper.h
copy to Source/bindings/dart/DartScriptState.h
index e1112ddd6a7da81036df6cc7a65a05c5bc74877f..a51fc3c0ece13fdeb08c1a538571d465ac1fc9db 100644
--- a/Source/bindings/dart/ThreadSafeDartIsolateWrapper.h
+++ b/Source/bindings/dart/DartScriptState.h
@@ -1,4 +1,4 @@
-// Copyright 2012, Google Inc.
+// Copyright 2013, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -27,26 +27,32 @@
 // (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