Parser cleanup: PreParser doesn't need to produce symbol data any more.

Parser cleanup: PreParser doesn't need to produce symbol data any more.

State of the art:
- Chromium doesn't do a separate preparsing phase any more.
- We start parsing with Parser, and when it sees a lazy function, it falls back
to PreParser for that function.
- The symbol data should contain symbols which are *outside* lazy functions.
- So Parser should always produce symbol data, and PreParser should never.
- Because it's this simple now, we don't need to keep track of "should
produce symbol data" (i.e., whether we're inside a lazy func or not).

R=ulan@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=20707

[marja, 2014-04-03 16:57:03]

ulan, ptal

[marja, 2014-04-03 16:57:04]

ulan, ptal

[marja, 2014-04-03 17:31:30]

(uploaded test fix; state of hubris now less)

[marja, 2014-04-04 07:46:07]

Meh, I'll restructure this a bit, I'll make another CL for just updating the
tests inside V8 to use the new compilation API. No need to review this...

[marja, 2014-04-14 07:48:02]

ulan, I did the test update & other cleanups (preparser API removal) in another
CLs, so this is relevant again (and minimal!). Pls review.

[ulan, 2014-04-14 08:18:43]

lgtm

[marja, 2014-04-14 08:49:39]

Committed patchset #3 manually as r20707 (presubmit successful).