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

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 9850afefb4298bcdf6af07a2e38fd316907c5768..5ac16bda4e0579a4df21ce17a4ec37db693174d2 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -305,9 +305,8 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   // get re-arranged).
   void OnOverviewModeStarting();
 
-  // Called before the overview mode is ending (before the windows get arranged
-  // to their final position).
-  void OnOverviewModeEnding();
+  // Called after overview mode has ended.
+  void OnOverviewModeEnded();
 
   // Called after maximize mode has started, windows might still animate though.
   void OnMaximizeModeStarted();