Removes a tracing CHECK supposed to investigate infinite SetAutoHideBehavior

ash/common/shelf/wm_shelf.h

Index: ash/common/shelf/wm_shelf.h
diff --git a/ash/common/shelf/wm_shelf.h b/ash/common/shelf/wm_shelf.h
index 64b00620ac88ce4ce2cd4c8cac8d591fd8adc975..ee88e94b1525b44d9b1dd9bcec0e70e3596a4705 100644
--- a/ash/common/shelf/wm_shelf.h
+++ b/ash/common/shelf/wm_shelf.h
@@ -11,7 +11,6 @@
 #include "ash/common/shelf/shelf_layout_manager_observer.h"
 #include "ash/public/cpp/shelf_types.h"
 #include "base/observer_list.h"
-#include "base/time/time.h"
 
 namespace gfx {
 class Rect;
@@ -172,10 +171,6 @@ class ASH_EXPORT WmShelf : public ShelfLayoutManagerObserver {
 
   base::ObserverList<WmShelfObserver> observers_;
 
-  // Temporary. Used to investigate http://crbug.com/665093 .
-  base::TimeTicks time_last_auto_hide_change_;
-  int count_auto_hide_changes_ = 0;
-
   // Forwards mouse and gesture events to ShelfLayoutManager for auto-hide.
   // TODO(mash): Facilitate simliar functionality in mash: crbug.com/631216
   std::unique_ptr<AutoHideEventHandler> auto_hide_event_handler_;