QtIFW

Change function names (to what they actually do) and signature.

The signature change is kind of a cosmetic one, but I think it
is more obvious that passing a reference into a function might
modify the parameter.

Change-Id: I424c06ed7a449204bd0b243ff07c2d36669b7381
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>