Translate: add UMA to measure duration time of infobar user action

Translate: add UMA to measure duration time of infobar user action

BUG=179277
TEST=unit_tests --gtest_filter='TranslateHelperMetricsTest.*'

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=200714

[Takashi Toyoshima, 2013-05-14 12:12:28]

Hi mad,
I'd like to add one more UMA to know how quickly users can push translate
button. Can you take a look?

[Takashi Toyoshima, 2013-05-16 04:07:06]

Hi mad,
I'm afraid of you missing this CL :)

[MAD, 2013-05-16 15:09:15]

Sorry about the delay, was busy with Google I/O extended...

LGTM... With one small request.

Thanks!

BYE
MAD

https://chromiumcodereview.appspot.com/14798008/diff/1/chrome/renderer/transl...
File chrome/renderer/translate/translate_helper_metrics.cc (right):

https://chromiumcodereview.appspot.com/14798008/diff/1/chrome/renderer/transl...
chrome/renderer/translate/translate_helper_metrics.cc:43: 
While you're there, we could add a COMPILE_ASSERT here too...

[Takashi Toyoshima, 2013-05-16 16:46:45]

https://chromiumcodereview.appspot.com/14798008/diff/1/chrome/renderer/transl...
File chrome/renderer/translate/translate_helper_metrics.cc (right):

https://chromiumcodereview.appspot.com/14798008/diff/1/chrome/renderer/transl...
chrome/renderer/translate/translate_helper_metrics.cc:43: 
Done by another CL which is already landed :)

[commit-bot: I haz the power, 2013-05-16 16:47:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/toyoshim@chromium.org/14798008/10001

[commit-bot: I haz the power, 2013-05-16 17:34:39]

Retried try job too often on linux_chromeos for step(s) interactive_ui_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_chro...

[commit-bot: I haz the power, 2013-05-16 19:43:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/toyoshim@chromium.org/14798008/10001

[commit-bot: I haz the power, 2013-05-17 03:44:51]

Change committed as 200714