56 class BaseVariable {
64     virtual void ValueChanged(BaseVariable* variable) = 0;
67   virtual ~BaseVariable() {  in ~BaseVariable()
89   virtual void AddObserver(BaseVariable::ObserverInterface* observer) {  in AddObserver()
96   virtual void RemoveObserver(BaseVariable::ObserverInterface* observer) {  in RemoveObserver()
102   BaseVariable(const std::string& name, VariableMode mode)  in BaseVariable()  function
103       : BaseVariable(  in BaseVariable()
108   BaseVariable(const std::string& name, base::TimeDelta poll_interval)  in BaseVariable()  function
109       : BaseVariable(name, kVariableModePoll, poll_interval) {}  in BaseVariable()
126           base::Bind(&BaseVariable::OnValueChangedNotification,  in NotifyValueChanged()
137   BaseVariable(const std::string& name,  in BaseVariable()  function
150     std::list<BaseVariable::ObserverInterface*> observer_list_copy(  in OnValueChangedNotification()
175   std::list<BaseVariable::ObserverInterface*> observer_list_;
177   DISALLOW_COPY_AND_ASSIGN(BaseVariable);
184 class Variable : public BaseVariable {
198       : BaseVariable(name, mode) {}  in Variable()
201       : BaseVariable(name, poll_interval) {}  in Variable()