Adds a CloneAndAnimate function to WindowManagerInternalClient

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 42 matching lines @@
   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);
 
+  float opacity() const { return opacity_; }
+  void SetOpacity(float value);
+
   const std::map<std::string, std::vector<uint8_t>>& properties() const {
     return properties_;
   }
   void SetProperty(const std::string& name, const std::vector<uint8_t>* value);
 
   // Returns true if this view is attached to |root| and all ancestors are
   // visible.
   bool IsDrawn(const ServerView* root) const;
 
   void SetSurfaceId(cc::SurfaceId surface_id);
   const cc::SurfaceId surface_id() const { return surface_id_; }
 
  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_;
   cc::SurfaceId surface_id_;
+  float opacity_;

[msw, 2014/11/18 23:37:42]

nit q: can you replace |visible_| with opacity_ > 0?
(maybe not, if SetVisible shouldn't clobber a tangential opacity)

[sky, 2014/11/19 00:49:39]

Indeed. They are two separate things. Opacity isn't configurable yet, but no
doubt that'll change.

[msw, 2014/11/19 01:27:51]

Acknowledged.

+
   std::map<std::string, std::vector<uint8_t>> properties_;
 
   DISALLOW_COPY_AND_ASSIGN(ServerView);
 };
 
 }  // namespace service
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_VIEW_MANAGER_SERVER_VIEW_H_