Adjust positioning of cros tray bubbles.

ash/common/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/common/system/chromeos/brightness/tray_brightness.h"
 
 #include <algorithm>
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shell_observer.h"
@@ skipping 229 matching lines @@
     brightness_view_ = NULL;
 }
 
 void TrayBrightness::DestroyDetailedView() {
   if (brightness_view_ && !brightness_view_->is_default_view())
     brightness_view_ = NULL;
 }
 
 void TrayBrightness::UpdateAfterLoginStatusChange(LoginStatus status) {}
 
-bool TrayBrightness::ShouldHideArrow() const {
-  return true;
-}
-
 bool TrayBrightness::ShouldShowShelf() const {
   return false;
 }
 
 void TrayBrightness::BrightnessChanged(int level, bool user_initiated) {
   WmShell::Get()->RecordUserMetricsAction(UMA_STATUS_AREA_BRIGHTNESS_CHANGED);
   double percent = static_cast<double>(level);
   HandleBrightnessChanged(percent, user_initiated);
 }
 
@@ skipping 14 matching lines @@
   if (!display::Display::HasInternalDisplay())
     return;
 
   if (brightness_view_)
     SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
   else
     PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
 }
 
 }  // namespace ash