Create system tray item for accessing chrome://slow

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"
 
 #if defined(OS_CHROMEOS)
 #include "ash/system/chromeos/network/network_state_notifier.h"
 #endif
 
@@ skipping 88 matching lines @@
 void SystemTrayNotifier::AddSessionLengthLimitObserver(
     SessionLengthLimitObserver* observer) {
   session_length_limit_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveSessionLengthLimitObserver(
     SessionLengthLimitObserver* observer) {
   session_length_limit_observers_.RemoveObserver(observer);
 }
 
+void SystemTrayNotifier::AddTracingObserver(TracingObserver* observer) {
+  tracing_observers_.AddObserver(observer);
+}
+
+void SystemTrayNotifier::RemoveTracingObserver(TracingObserver* observer) {
+  tracing_observers_.RemoveObserver(observer);
+}
+
 void SystemTrayNotifier::AddUpdateObserver(UpdateObserver* observer) {
   update_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveUpdateObserver(UpdateObserver* observer) {
   update_observers_.RemoveObserver(observer);
 }
 
 void SystemTrayNotifier::AddUserObserver(UserObserver* observer) {
   user_observers_.AddObserver(observer);
@@ skipping 53 matching lines @@
 #endif
 
 void SystemTrayNotifier::NotifyAccessibilityModeChanged(
     AccessibilityNotificationVisibility notify) {
   FOR_EACH_OBSERVER(
       AccessibilityObserver,
       accessibility_observers_,
       OnAccessibilityModeChanged(notify));
 }
 
+void SystemTrayNotifier::NotifyTracingModeChanged(bool value) {
+  FOR_EACH_OBSERVER(
+      TracingObserver,
+      tracing_observers_,
+      OnTracingModeChanged(value));
+}
+
 void SystemTrayNotifier::NotifyRefreshBluetooth() {
   FOR_EACH_OBSERVER(BluetoothObserver,
                     bluetooth_observers_,
                     OnBluetoothRefresh());
 }
 
 void SystemTrayNotifier::NotifyBluetoothDiscoveringChanged() {
   FOR_EACH_OBSERVER(BluetoothObserver,
                     bluetooth_observers_,
                     OnBluetoothDiscoveringChanged());
@@ skipping 149 matching lines @@
 }
 
 void SystemTrayNotifier::NotifyScreenShareStop() {
   FOR_EACH_OBSERVER(ScreenShareObserver, screen_share_observers_,
                     OnScreenShareStop());
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash