Teach SkyView code path to print hello, world

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 "base/single_thread_task_runner.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/public/interfaces/application/service_provider.mojom.h"
 #include "mojo/services/navigation/public/interfaces/navigation.mojom.h"
 #include "skia/ext/refptr.h"
 #include "sky/engine/public/platform/ServiceProvider.h"
+#include "sky/engine/public/sky/sky_view.h"
 #include "sky/engine/public/web/WebFrameClient.h"
 #include "sky/engine/public/web/WebViewClient.h"
 #include "sky/shell/gpu_delegate.h"
 #include "sky/shell/ui_delegate.h"
 #include "sky/shell/service_provider.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace sky {
 class PlatformImpl;
@@ skipping 54 matching lines @@
                        mojo::URLRequestPtr request) override;
   void DidNavigateLocally(const mojo::String& url) override;
   void RequestNavigateHistory(int32_t delta) override;
 
   void UpdateWebViewSize();
 
   Config config_;
   mojo::ServiceProviderPtr service_provider_;
   scoped_ptr<PlatformImpl> platform_impl_;
   scoped_ptr<Animator> animator_;
+
+  std::unique_ptr<blink::SkyView> sky_view_;
   blink::WebView* web_view_;
+
   float device_pixel_ratio_;
   gfx::Size physical_size_;
   mojo::Binding<ViewportObserver> viewport_observer_binding_;
 
   base::WeakPtrFactory<Engine> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Engine);
 };
 
 }  // namespace shell
 }  // namespace sky
 
 #endif  // SKY_SHELL_UI_ENGINE_H_