Spliting out TyperCache into ZoneTypeCache to share with AsmTyper.

Spliting out TyperCache into ZoneTypeCache to share with AsmTyper.

The zone type cache would be handy inside the asm.js typer.
Pulling it out into a seperate inlinable header to allow sharing.

BUG=https://code.google.com/p/v8/issues/detail?id=4203
TEST=None
R=andreas@chromium.org,titzer@chromium.org
LOG=N

Committed: https://crrev.com/e2b3edbf31a57023414f355f3b6ecbaa5689745f
Cr-Commit-Position: refs/heads/master@{#30398}

[titzer, 2015-08-26 21:27:49]

lgtm

[bradn, 2015-08-26 21:39:14]

The CQ bit was checked by bradnelson@google.com

[commit-bot: I haz the power, 2015-08-26 21:39:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1307093006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1307093006/1

[commit-bot: I haz the power, 2015-08-26 21:40:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-26 21:41:13]

Patchset 1 (id:??) landed as
https://crrev.com/e2b3edbf31a57023414f355f3b6ecbaa5689745f
Cr-Commit-Position: refs/heads/master@{#30398}