Add acquire/release calls in one-time init for histograms

Add acquire/release calls in one-time init for histograms

Clean up macros which do one-time initialization of
static pointer to histograms to use subtle atomic
operators.

r=willchan, dvyukov
BUG=7535006
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=95762

[jar (doing other things), 2011-08-04 22:27:23]

As per the associated bug, the approach taken is to just add the subtle
operations.

[dvyukov, 2011-08-05 14:07:27]

LGTM
+1 for comments and refactoring

[commit-bot: I haz the power, 2011-08-05 20:50:03]

No LGTM from valid reviewers yet.

[jar (doing other things), 2011-08-05 21:06:45]

I was told by the commit bot that I needed an LGTM from an OWNER..... so since
I'm in said file.... and I'm the CL author... I'll LGTM my own code (to add to
the existing review :-/ ).

[jar (doing other things), 2011-08-06 16:39:01]

wtc,

Could you review and/or rubber stamp this?  It has an LGTM from dvyukov, who is
well qualified to comment, but who (as pointed out by the commit bot) is not a
committer... and doesn't fully count.  Will seems to be off line, and I'd like
to get this landed and taken care of.

Thanks,

Jim

[willchan no longer on Chromium, 2011-08-06 23:00:23]

Rubberstamp LGTM

On Sat, Aug 6, 2011 at 5:39 PM,  <jar@chromium.org> wrote:
> wtc,
>
> Could you review and/or rubber stamp this?  It has an LGTM from dvyukov, who
> is
> well qualified to comment, but who (as pointed out by the commit bot) is not
> a
> committer... and doesn't fully count.  Will seems to be off line, and I'd
> like
> to get this landed and taken care of.
>
> Thanks,
>
> Jim
>
> http://codereview.chromium.org/7535006/
>

[commit-bot: I haz the power, 2011-08-07 02:47:57]

Can't apply patch for file base/metrics/histogram.h.
While running patch -p0 --forward --force;
patching file base/metrics/histogram.h
Hunk #1 FAILED at 45.
1 out of 6 hunks FAILED -- saving rejects to file base/metrics/histogram.h.rej