Version 4.2.77.16 (cherry-pick)

Merged 61ac4613

Revert of [x64] Improve instruction selection for TruncateInt64ToInt32. (patchset #1 id:1 of https://codereview.chromium.org/936323004/)

R=danno@chromium.org
BUG=chromium:478126
LOG=y

Review URL: https://codereview.chromium.org/1094863004

Cr-Commit-Position: refs/branch-heads/4.2@{#19}
Cr-Branched-From: 3dfd929e-refs/heads/4.2.77@{#2}
Cr-Branched-From: e0110920-refs/heads/master@{#26757}