Removes a tracing CHECK supposed to investigate infinite SetAutoHideBehavior

ash/shelf/shelf_layout_manager_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/shelf/shelf_layout_manager.h"
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/accelerators/accelerator_table.h"
 #include "ash/common/focus_cycler.h"
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 563 matching lines @@
   // Swipe-up to hide. This should have no effect because there are no visible
   // windows.
   end = below_start - delta;
   generator.GestureScrollSequenceWithCallback(
       below_start, end, kTimeDelta, kNumScrollSteps,
       base::Bind(&ShelfDragCallback::ProcessScroll,
                  base::Unretained(&handler)));
   EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
   EXPECT_EQ(SHELF_AUTO_HIDE_SHOWN, shelf->GetAutoHideState());
   EXPECT_EQ(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS, shelf->auto_hide_behavior());
-
-  // Avoid a CHECK that makes sure SetAutoHideBehavior is not called too
-  // frequently. This is to help investigate http://crbug.com/665093 .
-  shelf->count_auto_hide_changes_ = 0;
 }
 
 // Makes sure SetVisible updates work area and widget appropriately.
 TEST_F(ShelfLayoutManagerTest, SetVisible) {
   ShelfWidget* shelf_widget = GetShelfWidget();
   ShelfLayoutManager* manager = shelf_widget->shelf_layout_manager();
   // Force an initial layout.
   manager->LayoutShelf();
   EXPECT_EQ(SHELF_VISIBLE, manager->visibility_state());
 
@@ skipping 1224 matching lines @@
   // Open keyboard in sticky mode.
   kb_controller->ShowKeyboard(true);
   layout_manager->OnKeyboardBoundsChanging(keyboard_bounds());
 
   // Work area should be changed.
   EXPECT_NE(orig_work_area,
             display::Screen::GetScreen()->GetPrimaryDisplay().work_area());
 }
 
 }  // namespace ash