The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/64fe7102b48b16cacf19b2d640199dd6c366c716

commit 64fe7102b48b16cacf19b2d640199dd6c366c716
Author: Xiaohan Wang <xhwang@chromium.org>
Date: Sat May 27 03:55:48 2017

media: Add UMA for CDM session key status system code

System code associated with key status provides extra information on the
CDM status (e.g. error).

BUG= 726614 

Change-Id: Ic65d9807045f455bcd58b6caeab9e9c79ee18001
Reviewed-on: https://chromium-review.googlesource.com/516433
Reviewed-by: John Rummell <jrummell@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#475232}
[modify] https://crrev.com/64fe7102b48b16cacf19b2d640199dd6c366c716/media/blink/webcontentdecryptionmodulesession_impl.cc
[modify] https://crrev.com/64fe7102b48b16cacf19b2d640199dd6c366c716/tools/metrics/histograms/histograms.xml

The CL missed the branch point and we'd like to start collecting data as early as possible. Request merge to M60.

Your change meets the bar and is auto-approved for M60. Please go ahead and merge the CL to branch 3112 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), josafat@(ChromeOS), bustamante@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Thanks for the fix. 

Please confirm whether the fix is verified in canary. If yes, merge to 3112 branch before 4.00 PM PST(05/31) to make it to next release.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d2ff33f9b12a695f7458372917efcf69dbed21d5

commit d2ff33f9b12a695f7458372917efcf69dbed21d5
Author: Xiaohan Wang <xhwang@chromium.org>
Date: Wed May 31 00:45:17 2017

media: Add UMA for CDM session key status system code

System code associated with key status provides extra information on the
CDM status (e.g. error).

BUG= 726614 

Change-Id: Ic65d9807045f455bcd58b6caeab9e9c79ee18001
Reviewed-on: https://chromium-review.googlesource.com/516433
Reviewed-by: John Rummell <jrummell@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#475232}(cherry picked from commit 64fe7102b48b16cacf19b2d640199dd6c366c716)
Reviewed-on: https://chromium-review.googlesource.com/518424
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Cr-Commit-Position: refs/branch-heads/3112@{#45}
Cr-Branched-From: b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
[modify] https://crrev.com/d2ff33f9b12a695f7458372917efcf69dbed21d5/media/blink/webcontentdecryptionmodulesession_impl.cc
[modify] https://crrev.com/d2ff33f9b12a695f7458372917efcf69dbed21d5/tools/metrics/histograms/histograms.xml