Revert "Factor formal argument parsing into ParserBase"

Revert "Factor formal argument parsing into ParserBase"

Revert https://codereview.chromium.org/1078093002/ and follow-on parser
patches due to a perf regression.

This reverts commit 53ddccfc33f7052429e3261e15a2bbabb05760b3.
This reverts commit 71d3213a3f9da3f2ade37fe22ad02d8a658172c2.
This reverts commit 0f432ebb76350a69d59edc303c181c8ba1719c96.
This reverts commit 1dbc43272954e8cfdf7be9a57c953a74b2a4d9da.

R=marja@chromium.org

Committed: https://crrev.com/37520d3e0345f209780025bb84f355802abd3ad2
Cr-Commit-Position: refs/heads/master@{#27912}

[wingo, 2015-04-16 15:04:19]

I can confirm that this reversion set improves CodeLoad performance.

[wingo, 2015-04-16 15:09:22]

On 2015/04/16 15:04:19, wingo wrote:
> I can confirm that this reversion set improves CodeLoad performance.

Hmm, scratch that result.  Reapplying the first two, I have the same CodeLoad
perf.  Still investigating.

[wingo, 2015-04-16 15:25:09]

On 2015/04/16 15:09:22, wingo wrote:
> On 2015/04/16 15:04:19, wingo wrote:
> > I can confirm that this reversion set improves CodeLoad performance.
> 
> Hmm, scratch that result.  Reapplying the first two, I have the same CodeLoad
> perf.  Still investigating.

CodeLoad has a lot of variability for me.  Will contact the perf sheriffs to see
how to proceed.

[rossberg, 2015-04-16 16:19:35]

rossberg@chromium.org changed reviewers:
+ rossberg@chromium.org

[rossberg, 2015-04-16 16:19:35]

LGTM (rubberstamp)

Bummer.

[marja, 2015-04-16 16:20:54]

... maybe it's not so bad. It's still unclear whether this caused regression or
not... I couldn't see the graph :(

(Also, perf tryjobs for this might be relevant.)

[rossberg, 2015-04-17 09:27:25]

The CQ bit was checked by rossberg@chromium.org

[commit-bot: I haz the power, 2015-04-17 09:27:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1094653002/1

[commit-bot: I haz the power, 2015-04-17 09:51:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-17 09:51:46]

Patchset 1 (id:??) landed as
https://crrev.com/37520d3e0345f209780025bb84f355802abd3ad2
Cr-Commit-Position: refs/heads/master@{#27912}