Revert of Remove serializer-specific hash table size heuristic.

Revert of Remove serializer-specific hash table size heuristic. (patchset #1 id:1 of https://codereview.chromium.org/1265983006/ )

Reason for revert:
https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20gc%20stress/builds/3088/steps/Mjsunit/logs/load-proxy

Original issue's description:
> Remove serializer-specific hash table size heuristic.
>
> The heuristic can cause weird behavior when bootstrapping.
> The memory savings is not worth this hassle.
>
> Committed: https://crrev.com/a246e296c6366dcd0a2d8aa0df973d57093178f6
> Cr-Commit-Position: refs/heads/master@{#29992}

TBR=ulan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/186841f0a07d8925c1138b72c10f253a8ddf3899
Cr-Commit-Position: refs/heads/master@{#30000}

[Yang, 2015-08-04 14:08:27]

Created Revert of Remove serializer-specific hash table size heuristic.

[commit-bot: I haz the power, 2015-08-04 14:08:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1257873006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1257873006/1

[commit-bot: I haz the power, 2015-08-04 14:09:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-04 14:09:09]

Patchset 1 (id:??) landed as
https://crrev.com/186841f0a07d8925c1138b72c10f253a8ddf3899
Cr-Commit-Position: refs/heads/master@{#30000}