Add SystemTrayObservers

ash/system/tray/test_system_tray_delegate.h

 // 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.
 
 #ifndef ASH_TEST_TEST_SYSTEM_TRAY_DELEGATE_H_
 #define ASH_TEST_TEST_SYSTEM_TRAY_DELEGATE_H_
 
 #include "ash/system/tray/system_tray_delegate.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 
 // TODO(oshima/stevenjb): Move this to ash/test. crbug.com/159693.
 
 namespace ash {
 namespace test {
 
 class TestSystemTrayDelegate : public SystemTrayDelegate {
  public:
   TestSystemTrayDelegate();
 
   virtual ~TestSystemTrayDelegate();
 
  public:
   virtual void Initialize() OVERRIDE;
   virtual bool GetTrayVisibilityOnStartup() OVERRIDE;
 
   // Overridden from SystemTrayDelegate:
+  virtual SystemTrayObservers* GetSystemTrayObservers() OVERRIDE;
   virtual const string16 GetUserDisplayName() const OVERRIDE;
   virtual const std::string GetUserEmail() const OVERRIDE;
   virtual const gfx::ImageSkia& GetUserImage() const OVERRIDE;
   virtual user::LoginStatus GetUserLoginStatus() const OVERRIDE;
   virtual bool SystemShouldUpgrade() const OVERRIDE;
   virtual base::HourClockType GetHourClockType() const OVERRIDE;
   virtual PowerSupplyStatus GetPowerSupplyStatus() const OVERRIDE;
   virtual void RequestStatusUpdate() const OVERRIDE;
   virtual void ShowSettings() OVERRIDE;
   virtual void ShowDateSettings() OVERRIDE;
@@ skipping 62 matching lines @@
   gfx::ImageSkia null_image_;
   scoped_ptr<VolumeControlDelegate> volume_control_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSystemTrayDelegate);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_TEST_SYSTEM_TRAY_DELEGATE_H_