143         fTimeBase = 0;  in startFocus()
147         this->onTick(fTimeBase);  in startFocus()
157         fTimeBase = 0;  in startUnfocus()
189         if (!fTimeBase) {  in onTick()
190             fTimeBase = t;  in onTick()
193         const auto rel_t = (t - fTimeBase) / kFocusDuration,  in onTick()
248                     fTimeBase = 0;  member in SlideDir::FocusController
344     fTimeBase = 0;  in unload()
358     if (fTimeBase == 0) {  in animate()
360         fTimeBase = msec;  in animate()
363     const auto t = msec - fTimeBase;  in animate()