Add *.VC.opendb to the .gitignore These are new temporary files used by VS 2015 Update 1 Equivalent Chromium CR: https://codereview.chromium.org/1413153015 Change-Id: I7a73b3d45107cf2a81b604953482aed9f2c971f8 Reviewed-on: https://chromium-review.googlesource.com/314881 Tested-by: Austin Kinross <aukinros@microsoft.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>