Improve Dart Debugger performance and robustness by creating Dart wrappers using the standard SetNa…

Source/bindings/v8/V8Binding.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 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 293 matching lines @@
 }
 
 DOMWindow* toDOMWindow(v8::Handle<v8::Context> context)
 {
     v8::Handle<v8::Object> global = context->Global();
     ASSERT(!global.IsEmpty());
     v8::Handle<v8::Object> window = global->FindInstanceInPrototypeChain(V8DOMWindow::GetTemplate(context->GetIsolate(), MainWorld));
     if (!window.IsEmpty())
         return V8DOMWindow::toNative(window);
     window = global->FindInstanceInPrototypeChain(V8DOMWindow::GetTemplate(context->GetIsolate(), IsolatedWorld));
+    if (window.IsEmpty()) {
+        // TODO(jacobr): find a better solution.
+        return toDOMWindow(v8::Context::GetEntered());
+    }
     ASSERT(!window.IsEmpty());
     return V8DOMWindow::toNative(window);
 }
 
 ScriptExecutionContext* toScriptExecutionContext(v8::Handle<v8::Context> context)
 {
     v8::Handle<v8::Object> global = context->Global();
     v8::Handle<v8::Object> windowWrapper = global->FindInstanceInPrototypeChain(V8DOMWindow::GetTemplate(context->GetIsolate(), MainWorld));
     if (!windowWrapper.IsEmpty())
         return V8DOMWindow::toNative(windowWrapper)->scriptExecutionContext();
@@ skipping 103 matching lines @@
     if (!DOMWrapperWorld::isolatedWorldsExist())
         return MainWorld;
     ASSERT(!v8::Context::GetEntered().IsEmpty());
     DOMWrapperWorld* isolatedWorld = DOMWrapperWorld::isolatedWorld(v8::Context::GetEntered());
     if (isolatedWorld)
         return IsolatedWorld;
     return MainWorld;
 }
 
 } // namespace WebCore