Reland "Keep a canonical list of shared function infos."

Reland "Keep a canonical list of shared function infos."

This reverts commit 3164aa7483cb476da84895a3c9810015758fccf9.

Committed: https://crrev.com/cacb646d80daa429f6915824a741f595db7d5044
Cr-Commit-Position: refs/heads/master@{#29282}

[Yang, 2015-06-24 11:06:28]

yangguo@chromium.org changed reviewers:
+ adamk@chromium.org

[Yang, 2015-06-24 11:06:29]

This can be relanded once the fix for the code serializer to correctly deal with
weak cells goes in: https://codereview.chromium.org/1203973002/

But I'll most likely wait with this until after branching.

[adamk, 2015-06-24 14:49:00]

lgtm

[Yang, 2015-06-25 08:36:51]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-06-25 09:00:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1211453002/40001

[commit-bot: I haz the power, 2015-06-25 09:09:36]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-06-25 09:09:54]

Patchset 3 (id:??) landed as
https://crrev.com/cacb646d80daa429f6915824a741f595db7d5044
Cr-Commit-Position: refs/heads/master@{#29282}

[Yang, 2015-06-25 10:34:27]

A revert of this CL (patchset #3 id:40001) has been created in
https://codereview.chromium.org/1206263002/ by yangguo@chromium.org.

The reason for reverting is: proxies test failing
https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux64%20GC%20Str....