mash: Move TrayTracing to //ash/common/system/chromeos

ash/system/tray/system_tray_notifier.cc

 // Copyright (c) 2012 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/tray/system_tray_notifier.h"
 
 namespace ash {
 
 SystemTrayNotifier::SystemTrayNotifier() {
 }
 
 SystemTrayNotifier::~SystemTrayNotifier() {
 }
 
-void SystemTrayNotifier::AddTracingObserver(TracingObserver* observer) {
-  tracing_observers_.AddObserver(observer);
-}
-
-void SystemTrayNotifier::RemoveTracingObserver(TracingObserver* observer) {
-  tracing_observers_.RemoveObserver(observer);
-}
-
 void SystemTrayNotifier::AddUserObserver(UserObserver* observer) {
   user_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveUserObserver(UserObserver* observer) {
   user_observers_.RemoveObserver(observer);
 }
 
 #if defined(OS_CHROMEOS)
 
@@ skipping 88 matching lines @@
   last_window_closed_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveLastWindowClosedObserver(
     LastWindowClosedObserver* observer) {
   last_window_closed_observers_.RemoveObserver(observer);
 }
 
 #endif  // defined(OS_CHROMEOS)
 
-void SystemTrayNotifier::NotifyTracingModeChanged(bool value) {
-  FOR_EACH_OBSERVER(
-      TracingObserver,
-      tracing_observers_,
-      OnTracingModeChanged(value));
-}
-
 void SystemTrayNotifier::NotifyUserUpdate() {
   FOR_EACH_OBSERVER(UserObserver,
                     user_observers_,
                     OnUserUpdate());
 }
 
 void SystemTrayNotifier::NotifyUserAddedToSession() {
   FOR_EACH_OBSERVER(UserObserver,
                     user_observers_,
                     OnUserAddedToSession());
@@ skipping 85 matching lines @@
 
 void SystemTrayNotifier::NotifyLastWindowClosed() {
   FOR_EACH_OBSERVER(LastWindowClosedObserver,
                     last_window_closed_observers_,
                     OnLastWindowClosed());
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash