sky/shell should link with sky/engine

sky/shell/ui/engine.h

+// Copyright 2015 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_SHELL_UI_ENGINE_H_
+#define SKY_SHELL_UI_ENGINE_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "sky/engine/public/web/WebFrameClient.h"
+#include "sky/engine/public/web/WebViewClient.h"
+
+namespace sky {
+namespace shell {
+class PlatformImpl;
+
+class Engine : public blink::WebFrameClient,
+               public blink::WebViewClient {
+ public:
+  Engine();
+  ~Engine() override;
+
+  base::WeakPtr<Engine> GetWeakPtr();
+
+  void Init();
+
+ private:
+  scoped_ptr<PlatformImpl> platform_impl_;
+  blink::WebView* web_view_;
+
+  base::WeakPtrFactory<Engine> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(Engine);
+};
+
+}  // namespace shell
+}  // namespace sky
+
+#endif  // SKY_SHELL_UI_ENGINE_H_