Cast: add UMA for video encode accelerator initialization result.

Cast: add UMA for video encode accelerator initialization result.

Add Cast.Sender.VideoEncodeAcceleratorInitializeSuccess indicating
whether we were successful in initializing an external video encode
accelerator for cast sender.

BUG=397038
TEST=Cast, check histograms

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=289029

[Pawel Osciak, 2014-08-09 11:09:56]

PTAL

[hshi1, 2014-08-09 15:36:49]

lgtm

[Pawel Osciak, 2014-08-11 06:12:30]

The CQ bit was checked by posciak@chromium.org

[Pawel Osciak, 2014-08-11 06:12:35]

The CQ bit was unchecked by posciak@chromium.org

[Pawel Osciak, 2014-08-12 00:22:51]

The CQ bit was checked by posciak@chromium.org

[commit-bot: I haz the power, 2014-08-12 00:29:58]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/posciak@chromium.org/458693004/1

[Ilya Sherman, 2014-08-12 00:35:14]

histograms lgtm

https://codereview.chromium.org/458693004/diff/1/tools/metrics/histograms/his...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/458693004/diff/1/tools/metrics/histograms/his...
tools/metrics/histograms/histograms.xml:2186: +    sender has been successful.
nit: "has been" -> "was"

[Pawel Osciak, 2014-08-12 01:07:14]

The CQ bit was checked by posciak@chromium.org

[commit-bot: I haz the power, 2014-08-12 01:18:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/posciak@chromium.org/458693004/20001

[commit-bot: I haz the power, 2014-08-12 05:02:59]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)
  win_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel/...)

[commit-bot: I haz the power, 2014-08-12 05:06:59]

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

[commit-bot: I haz the power, 2014-08-12 05:07:00]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Pawel Osciak, 2014-08-12 05:50:57]

On 2014/08/12 05:07:00, I haz the power (commit-bot) wrote:
> Try jobs failed on following builders:
>   chromium_presubmit on tryserver.chromium.linux
>
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

Alpha: please owners. Thanks!

[Alpha Left Google, 2014-08-12 18:13:34]

lgtm

[commit-bot: I haz the power, 2014-08-12 18:25:53]

Change committed as 289029