Give up focus if the focused view becomes unfocusable

ui/views/focus/focus_manager.h

Index: ui/views/focus/focus_manager.h
diff --git a/ui/views/focus/focus_manager.h b/ui/views/focus/focus_manager.h
index ebdc2a3d88e2034ec7b08359af0546dddb9f07ce..a38d303116e3d55367b7a8ac7f453edd2c503688 100644
--- a/ui/views/focus/focus_manager.h
+++ b/ui/views/focus/focus_manager.h
@@ -184,6 +184,10 @@ class VIEWS_EXPORT FocusManager {
   // the native focus (so we still get keyboard events).
   void ClearFocus();
 
+  // Revises the focused view. Tries to advance focus if the focused view has
+  // become unfocusable.
+  void ReviseFocusedView();

[sky, 2014/08/07 21:40:34]

I would rather you name this something like AdvanceFocusIfNecessary.

[mohsen, 2014/08/08 01:32:07]

Done.

+
   // Validates the focused view, clearing it if the window it belongs too is not
   // attached to the window hierarchy anymore.
   void ValidateFocusedView();