Repeatedly overapproximate the weak closure as long as we make progress

Repeatedly overapproximate the weak closure as long as we make progress

Also, include the time for building object groups in the tracing scope
for the overapproximation.

BUG=v8:3862
R=hpayer@chromium.org
LOG=n

Committed: https://crrev.com/82fe1adfed1d458a6a6bbeba47b24438f4512acf
Cr-Commit-Position: refs/heads/master@{#27218}

[Hannes Payer (out of office), 2015-03-16 12:09:25]

https://codereview.chromium.org/1012593004/diff/1/src/heap/incremental-markin...
File src/heap/incremental-marking.cc (right):

https://codereview.chromium.org/1012593004/diff/1/src/heap/incremental-markin...
src/heap/incremental-marking.cc:548: void IncrementalMarking::MarkObjectGroups()
{
Should we have an upper bound on of how often this function is executing in one
overapproximation round?

[jochen (gone - plz use gerrit), 2015-03-16 12:17:27]

ptal

[Hannes Payer (out of office), 2015-03-16 12:19:58]

yey, more flags :) LGTM

[jochen (gone - plz use gerrit), 2015-03-16 12:20:16]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2015-03-16 12:20:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1012593004/20001

[commit-bot: I haz the power, 2015-03-16 12:51:51]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-16 12:52:04]

Patchset 2 (id:??) landed as
https://crrev.com/82fe1adfed1d458a6a6bbeba47b24438f4512acf
Cr-Commit-Position: refs/heads/master@{#27218}