Revert of [regexp] Add stub for RegExpExec instead of inlining

Revert of [regexp] Add stub for RegExpExec instead of inlining (patchset #1 id:1 of https://codereview.chromium.org/2677073004/ )

Reason for revert:
Doesn't fix perf regressions in crbug.com/688972 and introduces new ones for RegExp in crbug.com/689395.

Original issue's description:
> [regexp] Add stub for RegExpExec instead of inlining
> 
> The code produced for RegExpExec is quite large, and we ended up completely
> inlining it several spots.  This CL moves RegExpPrototypeExecBody into two
> stubs (one each for fast and slow paths) and converts inlined uses into stub
> calls. This decreases the local x64 snapshot size by around 80K.
> 
> BUG=chromium:688972
> 
> Review-Url: https://codereview.chromium.org/2677073004
> Cr-Commit-Position: refs/heads/master@{#42965}
> Committed: https://chromium.googlesource.com/v8/v8/+/5ea144afe3fd98896fc097a3523de9ab0cb8cd61

TBR=yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:688972
Review-Url: https://codereview.chromium.org/2679063003
Cr-Commit-Position: refs/heads/master@{#42985}
Committed: https://chromium.googlesource.com/v8/v8/+/7d15175a0f59dfc15cf811a45e358dd4cc9b36e9

[jgruber, 2017-02-07 10:07:47]

The CQ bit was checked by jgruber@chromium.org

[jgruber, 2017-02-07 10:07:48]

Created Revert of [regexp] Add stub for RegExpExec instead of inlining

[commit-bot: I haz the power, 2017-02-07 10:07:50]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-07 10:07:58]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486462067964930, "parent_rev":
"f4739ea863108016153941c29db4bf4568cbd734", "commit_rev":
"7d15175a0f59dfc15cf811a45e358dd4cc9b36e9"}

[commit-bot: I haz the power, 2017-02-07 10:08:02]

Description was changed from

==========
Revert of [regexp] Add stub for RegExpExec instead of inlining (patchset #1 id:1
of https://codereview.chromium.org/2677073004/ )

Reason for revert:
Doesn't fix perf regressions in crbug.com/688972 and introduces new ones for
RegExp in crbug.com/689395.

Original issue's description:
> [regexp] Add stub for RegExpExec instead of inlining
> 
> The code produced for RegExpExec is quite large, and we ended up completely
> inlining it several spots.  This CL moves RegExpPrototypeExecBody into two
> stubs (one each for fast and slow paths) and converts inlined uses into stub
> calls. This decreases the local x64 snapshot size by around 80K.
> 
> BUG=chromium:688972
> 
> Review-Url: https://codereview.chromium.org/2677073004
> Cr-Commit-Position: refs/heads/master@{#42965}
> Committed:
https://chromium.googlesource.com/v8/v8/+/5ea144afe3fd98896fc097a3523de9ab0cb...

TBR=yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:688972
==========

to

==========
Revert of [regexp] Add stub for RegExpExec instead of inlining (patchset #1 id:1
of https://codereview.chromium.org/2677073004/ )

Reason for revert:
Doesn't fix perf regressions in crbug.com/688972 and introduces new ones for
RegExp in crbug.com/689395.

Original issue's description:
> [regexp] Add stub for RegExpExec instead of inlining
> 
> The code produced for RegExpExec is quite large, and we ended up completely
> inlining it several spots.  This CL moves RegExpPrototypeExecBody into two
> stubs (one each for fast and slow paths) and converts inlined uses into stub
> calls. This decreases the local x64 snapshot size by around 80K.
> 
> BUG=chromium:688972
> 
> Review-Url: https://codereview.chromium.org/2677073004
> Cr-Commit-Position: refs/heads/master@{#42965}
> Committed:
https://chromium.googlesource.com/v8/v8/+/5ea144afe3fd98896fc097a3523de9ab0cb...

TBR=yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:688972

Review-Url: https://codereview.chromium.org/2679063003
Cr-Commit-Position: refs/heads/master@{#42985}
Committed:
https://chromium.googlesource.com/v8/v8/+/7d15175a0f59dfc15cf811a45e358dd4cc9...
==========

[commit-bot: I haz the power, 2017-02-07 10:08:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/7d15175a0f59dfc15cf811a45e358dd4cc9...

[agrieve, 2017-02-13 14:55:56]

On 2017/02/07 10:08:03, commit-bot: I haz the power wrote:
> Committed patchset #1 (id:1) as
>
https://chromium.googlesource.com/v8/v8/+/7d15175a0f59dfc15cf811a45e358dd4cc9...

This popped up on Chrome's size graph as a nice 80kb savings! Any chance a
reland will be pursued?

Relevant bug: https://bugs.chromium.org/p/chromium/issues/detail?id=690241