Revert of tabing inconsistencies between trays in status area

ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc

 // Copyright 2014 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/virtual_keyboard/virtual_keyboard_tray.h"
 
 #include "ash/common/keyboard/keyboard_ui.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/wm_shelf_util.h"
@@ skipping 27 matching lines @@
   } else {
     gfx::ImageSkia* image_non_md =
         ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
             IDR_AURA_UBER_TRAY_VIRTUAL_KEYBOARD);
     button_->SetImage(views::CustomButton::STATE_NORMAL, image_non_md);
   }
   button_->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
                              views::ImageButton::ALIGN_MIDDLE);
 
   tray_container()->AddChildView(button_);
-  button_->SetFocusBehavior(FocusBehavior::NEVER);
   SetContentsBackground();
   // The Shell may not exist in some unit tests.
   if (Shell::HasInstance())
     Shell::GetInstance()->keyboard_ui()->AddObserver(this);
 }
 
 VirtualKeyboardTray::~VirtualKeyboardTray() {
   // The Shell may not exist in some unit tests.
   if (Shell::HasInstance())
     Shell::GetInstance()->keyboard_ui()->RemoveObserver(this);
@@ skipping 47 matching lines @@
                                         const ui::Event& event) {
   DCHECK_EQ(button_, sender);
   PerformAction(event);
 }
 
 void VirtualKeyboardTray::OnKeyboardEnabledStateChanged(bool new_value) {
   SetVisible(Shell::GetInstance()->keyboard_ui()->IsEnabled());
 }
 
 }  // namespace ash