Revert of [heap] Decrease incremental marking finalization retry limit....

Revert of [heap] Decrease incremental marking finalization retry limit. (patchset #1 id:1 of https://codereview.chromium.org/1408183006/ )

Reason for revert:
crashes on webkit_unit_tests V8-Blink Linux 32

Original issue's description:
> [heap] Decrease incremental marking finalization retry limit.
>
> BUG=chromium:548562
> LOG=n
>
> Committed: https://crrev.com/c689f5759b46506c38c84f404ebd8dc326dcb76f
> Cr-Commit-Position: refs/heads/master@{#31647}

TBR=ulan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:548562

Review URL: https://codereview.chromium.org/1428783004

Cr-Commit-Position: refs/heads/master@{#31648}

src/flag-definitions.h

@@ -657,7 +657,7 @@ DEFINE_BOOL(age_code, true,
 DEFINE_BOOL(incremental_marking, true, "use incremental marking")
 DEFINE_BOOL(finalize_marking_incrementally, true,
             "finalize marking in incremental steps")
-DEFINE_INT(min_progress_during_incremental_marking_finalization, 32,
+DEFINE_INT(min_progress_during_incremental_marking_finalization, 128,
            "keep finalizing incremental marking as long as we discover at "
            "least this many unmarked objects")
 DEFINE_INT(max_incremental_marking_finalization_rounds, 3,