Declaring the weak_ptr_factory in proper order.

ash/system/chromeos/brightness/tray_brightness.cc

 // Copyright 2013 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/system/chromeos/brightness/tray_brightness.h"
 
 #include <algorithm>
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/ash_constants.h"
@@ skipping 156 matching lines @@
 void BrightnessView::SliderDragEnded(views::Slider* slider) {
   DCHECK_EQ(slider, slider_);
   dragging_ = false;
   slider_->SetValue(static_cast<float>(last_percent_ / 100.0));
 }
 
 }  // namespace tray
 
 TrayBrightness::TrayBrightness(SystemTray* system_tray)
     : SystemTrayItem(system_tray),
-      weak_ptr_factory_(this),
       brightness_view_(NULL),
       current_percent_(100.0),
-      got_current_percent_(false) {
+      got_current_percent_(false),
+      weak_ptr_factory_(this) {
   // Post a task to get the initial brightness; the BrightnessControlDelegate
   // isn't created yet.
   base::MessageLoopForUI::current()->PostTask(
       FROM_HERE,
       base::Bind(&TrayBrightness::GetInitialBrightness,
                  weak_ptr_factory_.GetWeakPtr()));
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
       AddObserver(this);
 }
 
@@ skipping 85 matching lines @@
   if (!Shell::GetInstance()->display_manager()->HasInternalDisplay())
     return;
 
   if (brightness_view_)
     SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
   else
     PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
 }
 
 }  // namespace ash