Support storing the VisibilityClient on windows other than the RootWindow. What this means is you c…

ui/aura/client/visibility_client.cc

Index: ui/aura/client/visibility_client.cc
===================================================================
--- ui/aura/client/visibility_client.cc	(revision 192570)
+++ ui/aura/client/visibility_client.cc	(working copy)
@@ -14,15 +14,21 @@
 
 // A property key to store a client that handles window visibility changes.
 DEFINE_LOCAL_WINDOW_PROPERTY_KEY(
-    VisibilityClient*, kRootWindowVisibilityClientKey, NULL);
+    VisibilityClient*, kWindowVisibilityClientKey, NULL);
 
-void SetVisibilityClient(RootWindow* root_window, VisibilityClient* client) {
-  root_window->SetProperty(kRootWindowVisibilityClientKey, client);
+
+void SetVisibilityClient(Window* window, VisibilityClient* client) {
+  window->SetProperty(kWindowVisibilityClientKey, client);
 }
 
-VisibilityClient* GetVisibilityClient(RootWindow* root_window) {
-  return root_window ?
-      root_window->GetProperty(kRootWindowVisibilityClientKey) : NULL;
+VisibilityClient* GetVisibilityClient(Window* window) {
+  VisibilityClient* visibility_client = NULL;
+  aura::Window* current = window;
+  do {
+    visibility_client = current->GetProperty(kWindowVisibilityClientKey);
+    current = current->parent();
+  } while (current && !visibility_client);
+  return visibility_client;
 }
 
 }  // namespace client