StepNone          533 src/debug.cc     thread_local_.last_step_action_ = StepNone;
StepNone          955 src/debug.cc                (thread_local_.last_step_action_ != StepNone &&
StepNone          975 src/debug.cc     } else if (thread_local_.last_step_action_ != StepNone) {
StepNone         1789 src/debug.cc     thread_local_.last_step_action_ = StepNone;