Method set_os_stack_trace_getter

tests/gtest/gtest-all.cc:7050–7056

Sets the OS stack trace getter. Does nothing if the input and the current OS stack trace getter are the same; otherwise, deletes the old getter and makes the input the current getter.

// the same; otherwise, deletes the old getter and makes the input the
// current getter.
void UnitTestImpl::set_os_stack_trace_getter(
    OsStackTraceGetterInterface* getter) {
  if (os_stack_trace_getter_ != getter) {
    delete os_stack_trace_getter_;
    os_stack_trace_getter_ = getter;
  }
}

// Returns the current OS stack trace getter if it is not NULL;
// otherwise, creates an OsStackTraceGetter, makes it the current