is_null            12 base/callback_internal.cc bool CallbackBase::is_null() const {
is_null            73 base/profiler/tracked_time.cc bool TrackedTime::is_null() const { return ms_ == 0; }
is_null            71 chrome/browser/net/load_timing_browsertest.cc   bool is_null() const { return is_null_; }
is_null            55 content/browser/loader/resource_scheduler.cc     bool is_null() {
is_null           674 content/common/page_state_serialization.cc       is_null(true) {