Fix infinite loop in regress-opt-after-deopt.

Fix infinite loop in regress-opt-after-deopt.

%CompleteOptimization attempts to install optimized functions
that the parallel thread has put on the output queue, as long as
the function is marked with a builtin.  However, activating the
debugger will set all functions to the lazy recompile builtin,
without the function being on the parallel recompilation pipeline.
So we wait for the function to finish parallel recompilation
while it's marked by a builtin that's unrelated to parallel
recompilation.

R=hpayer@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=15404

[Hannes Payer (out of office), 2013-07-01 08:54:25]

LGTM! Can we update the comment above the while loop with the description you
gave in the CL?

https://codereview.chromium.org/18129003/diff/1/src/runtime.cc
File src/runtime.cc (right):

https://codereview.chromium.org/18129003/diff/1/src/runtime.cc#newcode8317
src/runtime.cc:8317: // While function is in optimization pipeline, it is marked
with builtins.
Can we update the comment with the description you gave in the CL?

[Yang, 2013-07-01 09:14:21]

Committed patchset #1 manually as r15404 (presubmit successful).