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

Revert of Reland "Keep a canonical list of shared function infos." (patchset #3 id:40001 of https://codereview.chromium.org/1211453002/)

Reason for revert:
proxies test failing https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/903/steps/Mjsunit/logs/proxies

Original issue's description:
> 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}

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

Committed: https://crrev.com/f7ef0c9921549952011366c5d5b817e38e85f67f
Cr-Commit-Position: refs/heads/master@{#29285}

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

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

[commit-bot: I haz the power, 2015-06-25 10:34:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1206263002/1

[commit-bot: I haz the power, 2015-06-25 10:35:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-25 10:35:24]

Patchset 1 (id:??) landed as
https://crrev.com/f7ef0c9921549952011366c5d5b817e38e85f67f
Cr-Commit-Position: refs/heads/master@{#29285}