Tune cctest/test-parsing/ParserSync.

Tune cctest/test-parsing/ParserSync.

This test suffers heavily from combinatorial explosion. To redemedy
this situation a bit, two independent parsing flags are tested
separately, reducing the runtime by a factor of 4. Furthermore, the
code has been cleaned up a bit.

R=mstarzinger@chromium.org

Committed: http://code.google.com/p/v8/source/detail?r=17385

[Michael Starzinger, 2013-10-24 17:00:34]

LGTM with one comment to address.

https://codereview.chromium.org/40113002/diff/1/test/cctest/test-parsing.cc
File test/cctest/test-parsing.cc (right):

https://codereview.chromium.org/40113002/diff/1/test/cctest/test-parsing.cc#n...
test/cctest/test-parsing.cc:1093: void SetParserFlags(T* parser,
i::EnumSet<ParserFlag> flags) {
Just use ParserBase instead of a template parameter here. With my recent changes
there is a common base class for these accessors.

[Sven Panne, 2013-10-25 07:24:14]

Committed patchset #2 manually as r17385 (presubmit successful).