Omit commit position for Blink lastchange / version

BUG=535268
R=dpranke@chromium.org, pfeldman@chromium.org

Review URL: https://codereview.chromium.org/1361203002 .

(cherry picked from commit f880f0071d47ec1aa9608245222ad0b6f350e48c)

Cr-Original-Commit-Position: refs/heads/master@{#350370}
Cr-Commit-Position: refs/branch-heads/2454@{#501}
Cr-Branched-From: 12bfc3360892ec53cd00fc239a47e5298beb063b-refs/heads/master@{#338390}
2 files changed