Revert "Revert "Support multiple DOM isolates and tweak devtools frontend to better handle large #s…

Source/bindings/core/dart/DartApplicationLoader.h

Index: Source/bindings/core/dart/DartApplicationLoader.h
diff --git a/Source/bindings/core/dart/DartApplicationLoader.h b/Source/bindings/core/dart/DartApplicationLoader.h
index 8b8767f1b66c612dc93c17400c86037917100eb5..a453a478cd4013bd9dff2c4fd611258509520982 100644
--- a/Source/bindings/core/dart/DartApplicationLoader.h
+++ b/Source/bindings/core/dart/DartApplicationLoader.h
@@ -126,7 +126,9 @@ public:
 
     bool running() const { return m_state >= Running; }
     bool error() const { return m_state == Error; }
+    bool uninitialized() const { return m_state == Uninitialized; }
 
+    const KURL& scriptUrl() { return m_scriptUrl; }
 private:
     enum State {
         // The application failed to load.