JSC should try to make profiling deterministic because otherwise reproducing failures is

JSC should try to make profiling deterministic because otherwise reproducing failures is
nearly impossible
https://bugs.webkit.org/show_bug.cgi?id=89940

Rubber stamped by Gavin Barraclough.

This rolls out the part of http://trac.webkit.org/changeset/121215 that introduced randomness
into the system. Now, instead of randomizing the tier-up threshold, we always set it to an
artificially low (and statically predetermined!) value. This gives most of the benefit of
threshold randomization without actually making the system behave completely differently on
each invocation.

* bytecode/ExecutionCounter.cpp:
(JSC::ExecutionCounter::setThreshold):
* runtime/Options.cpp:
(Options):
(JSC::Options::initializeOptions):
* runtime/Options.h:
(Options):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121218 268f45cc-cd09-0410-ab3c-d52691b4dbfc