Removes a tracing CHECK supposed to investigate infinite SetAutoHideBehavior

ash/common/shelf/wm_shelf.cc

 // Copyright 2016 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/wm_shelf.h"
 
 #include "ash/common/shelf/shelf_controller.h"
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/shelf/shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_layout_manager.h"
@@ skipping 40 matching lines @@
         event, WmWindow::Get(static_cast<aura::Window*>(event->target())));
   }
 
  private:
   ShelfLayoutManager* shelf_layout_manager_;
   DISALLOW_COPY_AND_ASSIGN(AutoHideEventHandler);
 };
 
 // WmShelf ---------------------------------------------------------------------
 
-WmShelf::WmShelf() : time_last_auto_hide_change_(base::TimeTicks::Now()) {}
+WmShelf::WmShelf() {}
 
 WmShelf::~WmShelf() {}
 
 // static
 WmShelf* WmShelf::ForWindow(WmWindow* window) {
   return window->GetRootWindowController()->GetShelf();
 }
 
 // static
 bool WmShelf::CanChangeShelfAlignment() {
@@ skipping 134 matching lines @@
 int WmShelf::PrimaryAxisValue(int horizontal, int vertical) const {
   return IsHorizontalAlignment() ? horizontal : vertical;
 }
 
 void WmShelf::SetAutoHideBehavior(ShelfAutoHideBehavior auto_hide_behavior) {
   DCHECK(shelf_layout_manager_);
 
   if (auto_hide_behavior_ == auto_hide_behavior)
     return;
 
-  // Force a stack dump when this method is invoked too frequently.
-  // This block is here temporary to help investigate http://crbug.com/665093 .
-  constexpr int kAutoHideRepeatInterval = 1000;
-  constexpr int kMaxAutoHideChanges = 20;
-  if ((base::TimeTicks::Now() - time_last_auto_hide_change_).InMilliseconds() <
-      kAutoHideRepeatInterval) {
-    if (++count_auto_hide_changes_ > kMaxAutoHideChanges)
-      CHECK(false);
-  } else {
-    count_auto_hide_changes_ = 0;
-  }
-  time_last_auto_hide_change_ = base::TimeTicks::Now();
-
   auto_hide_behavior_ = auto_hide_behavior;
   WmShell::Get()->shelf_controller()->NotifyShelfAutoHideBehaviorChanged(this);
   WmShell::Get()->NotifyShelfAutoHideBehaviorChanged(
       GetWindow()->GetRootWindow());
 }
 
 ShelfAutoHideState WmShelf::GetAutoHideState() const {
   return shelf_layout_manager_->auto_hide_state();
 }
 
@@ skipping 148 matching lines @@
 
 void WmShelf::OnBackgroundUpdated(ShelfBackgroundType background_type,
                                   BackgroundAnimatorChangeType change_type) {
   if (background_type == GetBackgroundType())
     return;
   for (auto& observer : observers_)
     observer.OnBackgroundTypeChanged(background_type, change_type);
 }
 
 }  // namespace ash