Adjust positioning of cros tray bubbles.

ash/common/system/chromeos/brightness/tray_brightness.h

 // 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.
 
 #ifndef ASH_COMMON_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_
 
 #include "ash/common/system/tray/system_tray_item.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 24 matching lines @@
   void HandleInitialBrightness(double percent);
 
   // Overridden from SystemTrayItem.
   views::View* CreateTrayView(LoginStatus status) override;
   views::View* CreateDefaultView(LoginStatus status) override;
   views::View* CreateDetailedView(LoginStatus status) override;
   void DestroyTrayView() override;
   void DestroyDefaultView() override;
   void DestroyDetailedView() override;
   void UpdateAfterLoginStatusChange(LoginStatus status) override;
-  bool ShouldHideArrow() const override;
   bool ShouldShowShelf() const override;
 
   // Overriden from PowerManagerClient::Observer.
   void BrightnessChanged(int level, bool user_initiated) override;
 
   void HandleBrightnessChanged(double percent, bool user_initiated);
 
   tray::BrightnessView* brightness_view_;
 
   // Brightness level in the range [0.0, 100.0] that we've heard about most
   // recently.
   double current_percent_;
 
   // Has |current_percent_| been initialized?
   bool got_current_percent_;
 
   base::WeakPtrFactory<TrayBrightness> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBrightness);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_