56 class BaseVariable {
64     virtual void ValueChanged(BaseVariable* variable) = 0;
67   virtual ~BaseVariable() {  in ~BaseVariable()
93   virtual void AddObserver(BaseVariable::ObserverInterface* observer) {  in AddObserver()
100   virtual void RemoveObserver(BaseVariable::ObserverInterface* observer) {  in RemoveObserver()
106   BaseVariable(const std::string& name, VariableMode mode)  in BaseVariable()  function
107       : BaseVariable(  in BaseVariable()
112   BaseVariable(const std::string& name, base::TimeDelta poll_interval)  in BaseVariable()  function
113       : BaseVariable(name, kVariableModePoll, poll_interval) {}  in BaseVariable()
132           base::Bind(&BaseVariable::OnValueChangedNotification,  in NotifyValueChanged()
143   BaseVariable(const std::string& name,  in BaseVariable()  function
157     std::list<BaseVariable::ObserverInterface*> observer_list_copy(  in OnValueChangedNotification()
182   std::list<BaseVariable::ObserverInterface*> observer_list_;
187   DISALLOW_COPY_AND_ASSIGN(BaseVariable);
194 class Variable : public BaseVariable {
208       : BaseVariable(name, mode) {}  in Variable()
211       : BaseVariable(name, poll_interval) {}  in Variable()