Remove funky 2-stage initialization of ParserInfo and an adventurous memset.

Remove funky 2-stage initialization of ParserInfo and an adventurous memset.

R=titzer@chromium.org

Committed: https://chromium.googlesource.com/v8/v8/+/40567349df1f5fbd09a339d400764b9df6780af0

[Sven Panne, 2015-03-12 10:34:02]

svenpanne@chromium.org changed reviewers:
+ mstarzinger@chromium.org

[titzer, 2015-03-12 11:33:40]

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

[titzer, 2015-03-12 11:33:40]

lgtm if TODOs are removed

https://codereview.chromium.org/1002673002/diff/1/src/parser.h
File src/parser.h (right):

https://codereview.chromium.org/1002673002/diff/1/src/parser.h#newcode28
src/parser.h:28: // TODO(titzer) Make this private, see BackgroundParsingTask
constructor.
So the solution to that would be a (Zone*,Isolate*) constructor, but I think I'd
rather discourage that and just leave this "naked" Zone constructor.

[commit-bot: I haz the power, 2015-03-12 11:46:38]

Patchset 2 (id:??) landed as
https://crrev.com/40567349df1f5fbd09a339d400764b9df6780af0
Cr-Commit-Position: refs/heads/master@{#27155}

[Sven Panne, 2015-03-12 11:46:38]

Committed patchset #2 (id:20001) manually as
40567349df1f5fbd09a339d400764b9df6780af0 (presubmit successful).