The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d81353f54fc2a4cc20332f655ffe1c952e585669

commit d81353f54fc2a4cc20332f655ffe1c952e585669
Author: Takumi Fujimoto <takumif@chromium.org>
Date: Fri Jul 27 18:33:36 2018

[Media Router WebUI] Add a UMA metric to record sink search outcome

Add a boolean metric MediaRouter.Sink.SearchOutcome, which records
whether or not a sink was found for the ID that the user entered and
attempted to cast to.

Bug:  867086 
Change-Id: Ie1bf8072b7700298b8a783480b05a2e845666946
Reviewed-on: https://chromium-review.googlesource.com/1148956
Reviewed-by: Derek Cheng <imcheng@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578721}
[modify] https://crrev.com/d81353f54fc2a4cc20332f655ffe1c952e585669/chrome/browser/media/router/media_router_metrics.cc
[modify] https://crrev.com/d81353f54fc2a4cc20332f655ffe1c952e585669/chrome/browser/media/router/media_router_metrics.h
[modify] https://crrev.com/d81353f54fc2a4cc20332f655ffe1c952e585669/chrome/browser/media/router/media_router_metrics_unittest.cc
[modify] https://crrev.com/d81353f54fc2a4cc20332f655ffe1c952e585669/chrome/browser/ui/webui/media_router/media_router_ui.cc
[modify] https://crrev.com/d81353f54fc2a4cc20332f655ffe1c952e585669/tools/metrics/histograms/histograms.xml

I'd like to request a merge of c#1 into M69. This CL adds code to record a metric.

Updated OS labels.

Your change meets the bar and is auto-approved for M69. Please go ahead and merge the CL to branch 3497 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), kariahda@(iOS), cindyb@(ChromeOS), govind@(Desktop)

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

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/663e4ac4eb82ee6d4b4f9823a45df87d5315bace

commit 663e4ac4eb82ee6d4b4f9823a45df87d5315bace
Author: Takumi Fujimoto <takumif@chromium.org>
Date: Tue Jul 31 20:45:59 2018

[Media Router WebUI] Add a UMA metric to record sink search outcome

Add a boolean metric MediaRouter.Sink.SearchOutcome, which records
whether or not a sink was found for the ID that the user entered and
attempted to cast to.

Bug:  867086 
Change-Id: Ie1bf8072b7700298b8a783480b05a2e845666946
Reviewed-on: https://chromium-review.googlesource.com/1148956
Reviewed-by: Derek Cheng <imcheng@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#578721}(cherry picked from commit d81353f54fc2a4cc20332f655ffe1c952e585669)
Reviewed-on: https://chromium-review.googlesource.com/1156934
Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/branch-heads/3497@{#294}
Cr-Branched-From: 271eaf50594eb818c9295dc78d364aea18c82ea8-refs/heads/master@{#576753}
[modify] https://crrev.com/663e4ac4eb82ee6d4b4f9823a45df87d5315bace/chrome/browser/media/router/media_router_metrics.cc
[modify] https://crrev.com/663e4ac4eb82ee6d4b4f9823a45df87d5315bace/chrome/browser/media/router/media_router_metrics.h
[modify] https://crrev.com/663e4ac4eb82ee6d4b4f9823a45df87d5315bace/chrome/browser/media/router/media_router_metrics_unittest.cc
[modify] https://crrev.com/663e4ac4eb82ee6d4b4f9823a45df87d5315bace/chrome/browser/ui/webui/media_router/media_router_ui.cc
[modify] https://crrev.com/663e4ac4eb82ee6d4b4f9823a45df87d5315bace/tools/metrics/histograms/histograms.xml