cros: Fix various small issues with cast tray entry.

cros: Fix various small issues with cast tray entry.

673023: Do not show TrayCast active state until we have media router
information to prevent short visual glitch where we are "Casting to
unknown receiver".

683908: Only show local routes

671094: Better accessibility label for Stop casting button.

BUG=673023, 683908, 671094
Review-Url: https://codereview.chromium.org/2656003006
Cr-Commit-Position: refs/heads/master@{#447045}
(cherry picked from commit 461840ed16b4e886966d5bc44558668f8df382b7)

Review-Url: https://codereview.chromium.org/2697363002 .
Cr-Commit-Position: refs/branch-heads/2987@{#553}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/1dbca8ec13dcf78b1c689018527315856c2b0a95

[jdufault, 2017-02-16 19:13:21]

Description was changed from

==========
cros: Fix various small issues with cast tray entry.

673023: Do not show TrayCast active state until we have media router
information to prevent short visual glitch where we are "Casting to
unknown receiver".

683908: Only show local routes

671094: Better accessibility label for Stop casting button.

BUG=673023,683908,671094

Review-Url: https://codereview.chromium.org/2656003006
Cr-Commit-Position: refs/heads/master@{#447045}
(cherry picked from commit 461840ed16b4e886966d5bc44558668f8df382b7)
==========

to

==========
cros: Fix various small issues with cast tray entry.

673023: Do not show TrayCast active state until we have media router
information to prevent short visual glitch where we are "Casting to
unknown receiver".

683908: Only show local routes

671094: Better accessibility label for Stop casting button.

BUG=673023,683908,671094

Review-Url: https://codereview.chromium.org/2656003006
Cr-Commit-Position: refs/heads/master@{#447045}
(cherry picked from commit 461840ed16b4e886966d5bc44558668f8df382b7)

Review-Url: https://codereview.chromium.org/2697363002 .
Cr-Commit-Position: refs/branch-heads/2987@{#553}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/1dbca8ec13dcf78b1c6890185273...
==========

[jdufault, 2017-02-16 19:13:24]

Committed patchset #1 (id:1) manually as
1dbca8ec13dcf78b1c689018527315856c2b0a95.