Prepare push to trunk. Now working on version 3.23.0.

Prepare push to trunk.  Now working on version 3.23.0.

R=jkummerow@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=17448

[Jakob Kummerow, 2013-10-31 13:27:21]

https://codereview.chromium.org/50943003/diff/1/ChangeLog
File ChangeLog (right):

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode3
ChangeLog:3: [Sheriff] Mark failing test for nacl port.
drop this

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode7
ChangeLog:7: [Sheriff] Mark flaky test.
drop this

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode11
ChangeLog:11: Avoid pre-aging when debugger is active
drop this

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode17
ChangeLog:17: (jkummerow@chromium.org)
drop all CL authors

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode19
ChangeLog:19: Add no-variants option to test runner.
drop this

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode22
ChangeLog:22: Do not remove HAdd with zero if the other operand is a double.
drop this

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode25
ChangeLog:25: ia32: Fix comparisons of two constant double operands when exactly
one
drop this

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode29
ChangeLog:29: Temporarily allow HistogramTimerScopes to be nested
drop this

https://codereview.chromium.org/50943003/diff/1/ChangeLog#newcode32
ChangeLog:32: Function ElementsAreSafeToExamine was undefined in release heap
verify.
drop this

[Jakob Kummerow, 2013-10-31 13:28:46]

lgtm

[Michael Achenbach, 2013-10-31 13:29:41]

Committed patchset #2 manually as r17448 (presubmit successful).