Aura: Add non-browser windows into the list of "Alt + Tab" cycle list.

ash/wm/activation_controller.h

Index: ash/wm/activation_controller.h
diff --git a/ash/wm/activation_controller.h b/ash/wm/activation_controller.h
index df19a52ae8eb973d1be759d7ed774a61f18eef52..918bedc84a6694bd41027c410bc5deba46114dee 100644
--- a/ash/wm/activation_controller.h
+++ b/ash/wm/activation_controller.h
@@ -34,6 +34,12 @@ class ASH_EXPORT ActivationController
   static aura::Window* GetActivatableWindow(aura::Window* window,
                                             const aura::Event* event);
 
+  // Determines if the given window itself can be activated or not. Returns

[sky, 2012/03/27 14:59:58]

How about:
Returns true if |window| can be activated, false otherwise. If |window| has a
modal child it can not be activated.

[yoshiki, 2012/03/28 15:08:41]

Done. Thanks, I've used it. And the comment has been moved to
activation_client.h.

+  // true if the window itself can be activated. (If it has a modal child
+  // window, it cannot be activated, because the focus is propagated) Otherwise,
+  // return false.
+  static bool CanActivateWindowItself(aura::Window* window);

[sky, 2012/03/27 14:59:58]

Just CanActivateWindow, and this should be a method on ActivationClient.

[yoshiki, 2012/03/28 15:08:41]

Done.

+
   // Overridden from aura::client::ActivationClient:
   virtual void ActivateWindow(aura::Window* window) OVERRIDE;
   virtual void DeactivateWindow(aura::Window* window) OVERRIDE;