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

Source/bindings/dart/DartScriptState.cpp

 /*
  * Copyright (C) 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
@@ skipping 11 matching lines @@
  * 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.
  */
 
 #include "config.h"
-#include "core/html/ime/Composition.h"
+
+#include "bindings/dart/DartScriptState.h"
+
+#include "bindings/dart/DartUtilities.h"
+#include <dart_debugger_api.h>
 
 namespace WebCore {
 
-Composition::~Composition()
+DartScriptState::DartScriptState(Dart_Isolate isolate, intptr_t libraryId, v8::Handle<v8::Context> context) : ScriptState(context)
 {
+    m_isolate = isolate;
+    m_libraryId = libraryId;
+    Dart_Handle exception = 0;
+    m_libraryUrl = DartUtilities::dartToString(Dart_GetLibraryURL(libraryId), exception);
+    ASSERT(!exception);
 }
 
-PassRefPtr<Composition> Composition::create()
-{
-    return adoptRef(new Composition());
 }
-
-Composition::Composition()
-    : m_selectionStart(0)
-    , m_selectionEnd(0)
-{
-    ScriptWrappable::init(this);
-}
-
-const Vector<unsigned>& Composition::getSegments() const
-{
-    return m_segments;
-}
-
-} // namespace WebCore