Make hit testing work in layout2.dart

sky/engine/core/view/View.h

Index: sky/engine/core/view/View.h
diff --git a/sky/engine/core/view/View.h b/sky/engine/core/view/View.h
index edb3d567bece2498ba9513ba063c6fb9038792d7..e06c02618c500071a465ac488549872bfc7cbd1d 100644
--- a/sky/engine/core/view/View.h
+++ b/sky/engine/core/view/View.h
@@ -6,7 +6,9 @@
 #define SKY_ENGINE_CORE_VIEW_VIEW_H_
 
 #include "base/callback.h"
+#include "base/time/time.h"
 #include "sky/engine/core/painting/Picture.h"
+#include "sky/engine/core/view/BeginFrameCallback.h"
 #include "sky/engine/core/view/EventCallback.h"
 #include "sky/engine/public/platform/sky_display_metrics.h"
 #include "sky/engine/tonic/dart_wrappable.h"
@@ -19,7 +21,7 @@ class View : public RefCounted<View>, public DartWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     ~View() override;
-    static PassRefPtr<View> create(const base::Closure& schedulePaintCallback);
+    static PassRefPtr<View> create(const base::Closure& scheduleFrameCallback);
 
     double devicePixelRatio() const { return m_displayMetrics.device_pixel_ratio; }
     double width() const;
@@ -30,17 +32,20 @@ public:
 
     void setEventCallback(PassOwnPtr<EventCallback> callback);
 
-    void schedulePaint();
+    void setBeginFrameCallback(PassOwnPtr<BeginFrameCallback> callback);
+    void scheduleFrame();
 
     void setDisplayMetrics(const SkyDisplayMetrics& metrics);
     bool handleInputEvent(PassRefPtr<Event> event);
+    void beginFrame(base::TimeTicks frameTime);
 
 private:
-    explicit View(const base::Closure& schedulePaintCallback);
+    explicit View(const base::Closure& scheduleFrameCallback);
 
-    base::Closure m_schedulePaintCallback;
+    base::Closure m_scheduleFrameCallback;
     SkyDisplayMetrics m_displayMetrics;
     OwnPtr<EventCallback> m_eventCallback;
+    OwnPtr<BeginFrameCallback> m_beginFrameCallback;
     RefPtr<Picture> m_picture;
 };