Reland "Avoid excessive GCs in small heaps."

Reland "Avoid excessive GCs in small heaps."

Original issue's description:
> Avoid excessive GCs in small heaps.
>
> Small heaps and small heap growing factor can lead to excessive GCs in corner cases.
>
> Consider function F(old_gen_size, factor) that returns the number of bytes that
> have to be allocated in the old generation to start incremental marking.
>
> F(4MB, 1.1) = 4MB (because of kMinimumOldGenerationAllocationLimit)
> F(6MB, 1.1) = 2MB (because of kMinimumOldGenerationAllocationLimit)
> F(8MB, 1.1) = 800KB
>
> Funtion F should be monotonic in old_gen_size, but it currently has a minimum
> at kMinimumOldGenerationAllocationLimit.
>
> This CL makes F monotonic.
>
> BUG=
>
> Committed: https://crrev.com/22b1da99732b4db0754bf267ec470a2831216fb2
> Cr-Commit-Position: refs/heads/master@{#28549}

TBR=hpayer@chromium.org

Committed: https://crrev.com/b59fda16fcc3a8b3d49acee72cfea7253c556b7d
Cr-Commit-Position: refs/heads/master@{#28562}

[ulan, 2015-05-21 15:33:19]

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

[ulan, 2015-05-21 15:34:59]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2015-05-21 15:35:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1148953005/1

[commit-bot: I haz the power, 2015-05-21 16:02:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-21 16:02:23]

Patchset 1 (id:??) landed as
https://crrev.com/b59fda16fcc3a8b3d49acee72cfea7253c556b7d
Cr-Commit-Position: refs/heads/master@{#28562}