ImmediateInterpreter: use range-for loops

These are less verbose, easier to read, and allow more descriptive
identifiers to be used compared to it->first and it->second.

BUG=b:245989146
TEST=check cursor movements and gestures manually; run unit tests

Change-Id: I02d9021faa9818926c8cff4c2d7852f8d416dda0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/5358097
Commit-Queue: Harry Cutts <hcutts@chromium.org>
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Tested-by: Harry Cutts <hcutts@chromium.org>
1 file changed