On the PC is this file not present. However, when I look at a PC on my work where Arduino works flawless under LabVIEW this file is also not available; the RobotIRremote directory is absent as well.
If C:\program files (x86)\Arduino\Libraries\RobotIRremote\IRremoteTools.cpp didn't exist, the compiler would not be able to (try to) compile the file. Therefore, your assertion that the file doesn't exist is wrong.