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..8d4a625e13e72ec9aab2c160e03e59900d2648f6 100644
--- a/ash/wm/overview/window_selector_controller.h
+++ b/ash/wm/overview/window_selector_controller.h
@@ -44,6 +44,10 @@ class ASH_EXPORT WindowSelectorController
   // 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;