This script makes debugging in Chrome easier on Windows. It scans
for the latest set of ANGLE DLLs among many search paths, and then
copies them to the latest Chrome Canary binary directory. It also
backs up the original DLLs if it finds them.

BUG=None

Change-Id: I66f8897a1393ceba8f614e4f91c0e1f9f0439eb3
Reviewed-on: https://chromium-review.googlesource.com/341221Reviewed-by: Geoff Lang <geofflang@chromium.org>