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

Source/bindings/core/dart/DartController.h

Index: Source/bindings/core/dart/DartController.h
diff --git a/Source/bindings/core/dart/DartController.h b/Source/bindings/core/dart/DartController.h
index b2ed31b0538d576321434107396afde29139d430..d06025f35a161b2a14c43fbc2d3a13f4a314ca82 100644
--- a/Source/bindings/core/dart/DartController.h
+++ b/Source/bindings/core/dart/DartController.h
@@ -108,17 +108,21 @@ private:
 
     static void weakCallback(void* isolateCallbackData, Dart_WeakPersistentHandle, void* peer);
 
-    HashSet<Document*> m_documentsWithDart;
-
     LibraryIdMap* libraryIdMapForIsolate(Dart_Isolate);
     DartScriptState* lookupScriptStateFromLibraryIdMap(Dart_Isolate, v8::Handle<v8::Context>, LibraryIdMap*, intptr_t libraryId);
 
+    String isolateName(Dart_Isolate);
     // The frame that owns this controller.
     LocalFrame* m_frame;
 
     // Isolate associated with scripts in this document.
     Vector<Dart_Isolate> m_isolates;
-    RefPtr<DartApplicationLoader> m_loader;
+    typedef HashMap<Dart_Isolate, RefPtr<DartApplicationLoader> > DartApplicationLoaderMap;
+
+    DartApplicationLoaderMap m_loaders;
+    RefPtr<DartApplicationLoader> m_mainLoader;
+    HashMap<Dart_Isolate, String> m_isolateNames;
+    HashSet<String> m_usedNames;
 
     ScriptStatesMap m_scriptStates;