[heap] Disable moving object starts aka left trimming

[heap] Disable moving object starts aka left trimming

BUG=

Committed: https://crrev.com/23c30021f28fe8d1ed15334fac852a9e21d42843
Cr-Commit-Position: refs/heads/master@{#30303}

[Michael Lippautz, 2015-08-21 12:11:19]

mlippautz@chromium.org changed reviewers:
+ hpayer@chromium.org

[Michael Lippautz, 2015-08-21 12:11:19]

Impact on Havlak:
d8 benchmarks/common/javascript/bench.js benchmarks/Havlak/javascript/Havlak.js
--predictable --move-object-start ; done | awk -e '{ sum+=$2 } END { print
sum/NR; }'
1399.88

d8 benchmarks/common/javascript/bench.js benchmarks/Havlak/javascript/Havlak.js
--predictable --nomove-object-start ; done | awk -e '{ sum+=$2 } END { print
sum/NR; }'
1403.58

[Hannes Payer (out of office), 2015-08-21 12:16:00]

lgtm

[Michael Lippautz, 2015-08-21 12:28:17]

The CQ bit was checked by mlippautz@chromium.org

[commit-bot: I haz the power, 2015-08-21 12:28:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1301963002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1301963002/20001

[commit-bot: I haz the power, 2015-08-21 12:59:28]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-08-21 12:59:34]

Patchset 2 (id:??) landed as
https://crrev.com/23c30021f28fe8d1ed15334fac852a9e21d42843
Cr-Commit-Position: refs/heads/master@{#30303}