Add UMAs for gpu rasterization .

Add UMAs for gpu rasterization.

The recording of the histograms has already landed in r273559.

BUG=376811
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=274003

[Alexei Svitkine (slow), 2014-05-30 18:52:28]

In the future, please keep the histograms.xml and code changes in the same CL.

LGTM % comment

https://codereview.chromium.org/302143006/diff/1/tools/metrics/histograms/his...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/302143006/diff/1/tools/metrics/histograms/his...
tools/metrics/histograms/histograms.xml:22172: + 
<owner>wiltzius@chromium.org</owner>
Would it make more sense for you to be the owner for these, given you know the
intimate details of how they work? The idea of owners is to have the eng who can
explain this histogram listed there.

[alokp, 2014-05-30 19:02:37]

https://codereview.chromium.org/302143006/diff/1/tools/metrics/histograms/his...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/302143006/diff/1/tools/metrics/histograms/his...
tools/metrics/histograms/histograms.xml:22172: + 
<owner>wiltzius@chromium.org</owner>
On 2014/05/30 18:52:28, Alexei Svitkine wrote:
> Would it make more sense for you to be the owner for these, given you know the
> intimate details of how they work? The idea of owners is to have the eng who
can
> explain this histogram listed there.

Done.

[alokp, 2014-05-30 19:02:55]

The CQ bit was checked by alokp@chromium.org

[commit-bot: I haz the power, 2014-05-30 19:03:59]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/alokp@chromium.org/302143006/20001

[commit-bot: I haz the power, 2014-05-31 04:02:48]

Change committed as 274003