Get rid of recursive locks for job based recompilation

Get rid of recursive locks for job based recompilation

For flushing the input queue, use the input queue lock. Introduce an
explicit refcount to make sure we don't delete the thread object before
all jobs are finished.

BUG=v8:3608
R=yangguo@chromium.org
LOG=n

Committed: https://crrev.com/2f7c192676b1549889a3b829d829b0b984e17ccd
Cr-Commit-Position: refs/heads/master@{#26812}

[Yang, 2015-02-24 09:57:13]

lgtm with comment.

https://codereview.chromium.org/948863002/diff/1/src/optimizing-compiler-thre...
File src/optimizing-compiler-thread.cc (right):

https://codereview.chromium.org/948863002/diff/1/src/optimizing-compiler-thre...
src/optimizing-compiler-thread.cc:199: *flag = STOP;
I'd prefer having brackets around if-else blocks. But we could also use a
ternary operator.

[jochen (gone - plz use gerrit), 2015-02-24 10:06:21]

The CQ bit was checked by jochen@chromium.org

[jochen (gone - plz use gerrit), 2015-02-24 10:06:22]

The patchset sent to the CQ was uploaded after l-g-t-m from yangguo@chromium.org
Link to the patchset: https://codereview.chromium.org/948863002/#ps20001 (title:
"updates")

[commit-bot: I haz the power, 2015-02-24 10:07:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/948863002/20001

[commit-bot: I haz the power, 2015-02-24 10:07:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/948863002/20001

[commit-bot: I haz the power, 2015-02-24 10:11:09]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-24 10:11:10]

Try jobs failed on following builders:
  v8_linux_gcc_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_gcc_compile_rel/bu...)

[commit-bot: I haz the power, 2015-02-24 10:11:11]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-24 10:11:12]

Try jobs failed on following builders:
  v8_linux_gcc_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_gcc_compile_rel/bu...)

[jochen (gone - plz use gerrit), 2015-02-24 10:19:36]

The CQ bit was checked by jochen@chromium.org

[jochen (gone - plz use gerrit), 2015-02-24 10:19:36]

The patchset sent to the CQ was uploaded after l-g-t-m from yangguo@chromium.org
Link to the patchset: https://codereview.chromium.org/948863002/#ps40001 (title:
"updates")

[commit-bot: I haz the power, 2015-02-24 10:20:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/948863002/40001

[commit-bot: I haz the power, 2015-02-24 10:20:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/948863002/40001

[commit-bot: I haz the power, 2015-02-24 10:41:31]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-02-24 10:41:53]

Patchset 3 (id:??) landed as
https://crrev.com/2f7c192676b1549889a3b829d829b0b984e17ccd
Cr-Commit-Position: refs/heads/master@{#26812}