Adds a CloneAndAnimate function to WindowManagerInternalClient

mojo/services/view_manager/display_manager.cc

Index: mojo/services/view_manager/display_manager.cc
diff --git a/mojo/services/view_manager/display_manager.cc b/mojo/services/view_manager/display_manager.cc
index a3be440bd5624d94b4134662766b1992dd22a69d..ccd828ca45b4410b823c7a1fd36b0cad0835963a 100644
--- a/mojo/services/view_manager/display_manager.cc
+++ b/mojo/services/view_manager/display_manager.cc
@@ -31,7 +31,7 @@ void DrawViewTree(Pass* pass,
   for (std::vector<const ServerView*>::reverse_iterator it = children.rbegin();
        it != children.rend();
        ++it) {
-    DrawViewTree(pass, *it, offset + view->bounds().OffsetFromOrigin());
+    DrawViewTree(pass, *it, node_bounds.OffsetFromOrigin());
   }
 
   cc::SurfaceId node_id = view->surface_id();
@@ -53,6 +53,8 @@ void DrawViewTree(Pass* pass,
   surface_quad->surface_quad_state = surface_quad_state.Pass();
 
   SharedQuadStatePtr sqs = CreateDefaultSQS(*Size::From(node_bounds.size()));
+  sqs->blend_mode = SK_XFERMODE_kSrcOver_Mode;
+  sqs->opacity = view->opacity();

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

q: will applying the same opacity throughout the view tree in your stub
animation make nested views render progressively more transparent?

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

Yes. Opacity is inherited.

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

Acknowledged.

   sqs->content_to_target_transform = Transform::From(node_transform);
 
   pass->quads.push_back(surface_quad.Pass());