Changes view manager to report visibility and drawn state

mojo/services/view_manager/server_view.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 MOJO_SERVICES_VIEW_MANAGER_SERVER_VIEW_H_
 #define MOJO_SERVICES_VIEW_MANAGER_SERVER_VIEW_H_
 
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 35 matching lines @@
 
   const ServerView* GetRoot() const;
   ServerView* GetRoot() {
     return const_cast<ServerView*>(
         const_cast<const ServerView*>(this)->GetRoot());
   }
 
   std::vector<const ServerView*> GetChildren() const;
   std::vector<ServerView*> GetChildren();
 
+  // Returns true if this contains |view| or is |view|.
   bool Contains(const ServerView* view) const;
 
   // Returns true if the window is visible. This does not consider visibility
   // of any ancestors.
   bool visible() const { return visible_; }
   void SetVisible(bool value);
 
+  // Returns true if this view is attached to |root| and all ancestors are
+  // visible.
+  bool IsDrawn(const ServerView* root) const;
+
   void SetBitmap(const SkBitmap& contents);
   const SkBitmap& bitmap() const { return bitmap_; }
 
  private:
   typedef std::vector<ServerView*> Views;
 
   // Implementation of removing a view. Doesn't send any notification.
   void RemoveImpl(ServerView* view);
 
   ServerViewDelegate* delegate_;
   const ViewId id_;
   ServerView* parent_;
   Views children_;
   bool visible_;
   gfx::Rect bounds_;
   SkBitmap bitmap_;
 
   DISALLOW_COPY_AND_ASSIGN(ServerView);
 };
 
 }  // namespace service
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_VIEW_MANAGER_SERVER_VIEW_H_