X87: Use Cells to check prototype chain validity (disabled by default).

X87: Use Cells to check prototype chain validity (disabled by default).

port 0179ec57975c5063bbecd98e11cdda77ddad8996 (r27846).

original commit message:

 The cells are stored on prototypes (in their map's PrototypeInfo). When a
 prototype object changes its map, then both its own validity cell and those
 of all "downsstream" prototypes are invalidated; handlers for a given receiver
 embed the currently valid cell for that receiver's prototype during their
 compilation and check it on execution.

BUG=

Committed: https://crrev.com/758c5e123b7311ff32d14c4fd79aa72b55ca18df
Cr-Commit-Position: refs/heads/master@{#27877}

[chunyang.dai, 2015-04-16 07:02:01]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-04-16 07:02:01]

PTAL.

[Weiliang, 2015-04-16 09:38:43]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-04-16 09:38:43]

lgtm

[commit-bot: I haz the power, 2015-04-16 09:39:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1090803002/1

[commit-bot: I haz the power, 2015-04-16 10:40:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-16 10:41:10]

Patchset 1 (id:??) landed as
https://crrev.com/758c5e123b7311ff32d14c4fd79aa72b55ca18df
Cr-Commit-Position: refs/heads/master@{#27877}