Script-based imports should basically work

sky/engine/core/app/ModuleLoader.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SKY_ENGINE_CORE_APP_MODULE_LOADER_H_
+#define SKY_ENGINE_CORE_APP_MODULE_LOADER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "platform/fetcher/MojoFetcher.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/RefCounted.h"
+#include "wtf/RefPtr.h"
+
+namespace blink {
+class Application;
+class Document;
+class Module;
+
+class ModuleLoader : public MojoFetcher::Client {
+ public:
+  class Client {
+   public:
+    virtual void OnModuleLoadComplete(ModuleLoader*, Module*) = 0;
+
+   protected:
+    virtual ~Client();
+  };
+
+  enum State {
+    LOADING,
+    COMPLETE,
+  };
+
+  ModuleLoader(Client*, Application*, const KURL&);
+  ~ModuleLoader();
+
+  State state() const { return state_; }
+  Module* module() const { return module_.get(); }
+
+ private:
+  // MojoFetcher::Client
+  void OnReceivedResponse(mojo::URLResponsePtr) override;
+
+  void OnParsingComplete();
+
+  State state_;
+  Client* client_;
+  Application* application_;
+  OwnPtr<MojoFetcher> fetcher_;
+  RefPtr<Module> module_;
+
+  base::WeakPtrFactory<ModuleLoader> weak_factory_;
+};
+
+} // namespace blink
+
+#endif // SKY_ENGINE_CORE_APP_MODULE_LOADER_H_