Use persistent ID/names for displays.

ash/display/display_controller.h

Index: ash/display/display_controller.h
diff --git a/ash/display/display_controller.h b/ash/display/display_controller.h
index 45fa80136a4313f8034ac079c00566f882cc5738..f9b818fef2cb3ab27a395a9ed3373c61f8e95b1f 100644
--- a/ash/display/display_controller.h
+++ b/ash/display/display_controller.h
@@ -100,11 +100,14 @@ class ASH_EXPORT DisplayController : public aura::DisplayObserver {
 
   // Creates a root window for |display| and stores it in the |root_windows_|
   // map.
-  aura::RootWindow* AddRootWindowForDisplay(const gfx::Display& display);
+  // TODO(oshima): remove |is_primary| when non extended desktop mode is
+  // removed.
+  aura::RootWindow* AddRootWindowForDisplay(const gfx::Display& display,
+                                            bool is_primary);
 
   void UpdateDisplayBoundsForLayout();
 
-  std::map<int, aura::RootWindow*> root_windows_;
+  std::map<int64, aura::RootWindow*> root_windows_;

[Daniel Erat, 2012/08/20 15:12:07]

nit: add a comment describing what the key value represents

[Jun Mukai, 2012/08/21 02:13:11]

Done.

 
   SecondaryDisplayLayout secondary_display_layout_;