Changes view manager to report visibility and drawn state

mojo/services/view_manager/view_manager_service_impl.h

Index: mojo/services/view_manager/view_manager_service_impl.h
diff --git a/mojo/services/view_manager/view_manager_service_impl.h b/mojo/services/view_manager/view_manager_service_impl.h
index f505622c2d5a770a98ebb21ac7d7402fb1491910..3e2952809167fc3ff9807a3f330aaf965c15b851 100644
--- a/mojo/services/view_manager/view_manager_service_impl.h
+++ b/mojo/services/view_manager/view_manager_service_impl.h
@@ -77,6 +77,10 @@ class MOJO_VIEW_MANAGER_EXPORT ViewManagerServiceImpl
                                 const gfx::Rect& old_bounds,
                                 const gfx::Rect& new_bounds,
                                 bool originated_change);
+  void ProcessWillChangeViewHierarchy(const ServerView* view,
+                                      const ServerView* new_parent,
+                                      const ServerView* old_parent,
+                                      bool originated_change);
   void ProcessViewHierarchyChanged(const ServerView* view,
                                    const ServerView* new_parent,
                                    const ServerView* old_parent,
@@ -86,6 +90,8 @@ class MOJO_VIEW_MANAGER_EXPORT ViewManagerServiceImpl
                           OrderDirection direction,
                           bool originated_change);
   void ProcessViewDeleted(const ViewId& view, bool originated_change);
+  void ProcessWillChangeViewVisibility(const ServerView* view,
+                                       bool originated_change);
 
   // TODO(sky): move this to private section (currently can't because of
   // bindings).
@@ -136,6 +142,10 @@ class MOJO_VIEW_MANAGER_EXPORT ViewManagerServiceImpl
   void GetViewTreeImpl(const ServerView* view,
                        std::vector<const ServerView*>* views) const;
 
+  // Notify the client if the drawn state of any of the roots changes.
+  // |view| is the view that is changing to the drawn state |new_drawn_value|.
+  void NotifyDrawnStateChanged(const ServerView* view, bool new_drawn_value);
+
   // ViewManagerService:
   virtual void CreateView(Id transport_view_id,
                           const Callback<void(ErrorCode)>& callback) OVERRIDE;