Change overview mode to so that docked panel windows are not grouped together.

ash/wm/overview/window_selector_controller.h

Index: ash/wm/overview/window_selector_controller.h
diff --git a/ash/wm/overview/window_selector_controller.h b/ash/wm/overview/window_selector_controller.h
index 7ccf768c92c6adcf7ecec293da2d7e728f223855..dc4de0031da9e1ed606e5dd65f9c97a6d378a57f 100644
--- a/ash/wm/overview/window_selector_controller.h
+++ b/ash/wm/overview/window_selector_controller.h
@@ -39,11 +39,16 @@ class ASH_EXPORT WindowSelectorController
   // Enters overview mode. This is essentially the window cycling mode however
   // not released on releasing the alt key and allows selecting with the mouse
   // or touch rather than keypresses.
+  // NOTE: Overview mode must not be active when destructing |this|.
   void ToggleOverview();
 
   // Returns true if window selection mode is active.
   bool IsSelecting();
 
+  // Returns true if overview mode is restoring minimized windows so that they
+  // are visible during overview mode.
+  bool IsRestoringMinimizedWindows() const;
+
   // WindowSelectorDelegate:
   void OnSelectionEnded() override;