[Media Router WebUI] Use updated sink on click

[Media Router WebUI] Use updated sink on click

Since crrev.com/2221933003, the dom-repeat element that creates the sink
list doesn't seem to correctly update its element-item mapping.  Instead
we will use the most current sink object with the same ID in our own
map.

BUG=637222
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2252313002
Cr-Commit-Position: refs/heads/master@{#413573}
(cherry picked from commit 7e3c3e80f15d513f9c2fe7a59b1854c7e1ff47e9)

Committed: https://chromium.googlesource.com/chromium/src/+/6ecece00c2f3b6736fdd4d9a4d92313fa718ad8d

[mark a. foltz, 2016-08-25 19:00:57]

Description was changed from

==========
[Media Router WebUI] Use updated sink on click

Since crrev.com/2221933003, the dom-repeat element that creates the sink
list doesn't seem to correctly update its element-item mapping.  Instead
we will use the most current sink object with the same ID in our own
map.

BUG=637222
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2252313002
Cr-Commit-Position: refs/heads/master@{#413573}
(cherry picked from commit 7e3c3e80f15d513f9c2fe7a59b1854c7e1ff47e9)
==========

to

==========
[Media Router WebUI] Use updated sink on click

Since crrev.com/2221933003, the dom-repeat element that creates the sink
list doesn't seem to correctly update its element-item mapping.  Instead
we will use the most current sink object with the same ID in our own
map.

BUG=637222
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2252313002
Cr-Commit-Position: refs/heads/master@{#413573}
(cherry picked from commit 7e3c3e80f15d513f9c2fe7a59b1854c7e1ff47e9)

Committed:
https://chromium.googlesource.com/chromium/src/+/6ecece00c2f3b6736fdd4d9a4d92...
==========

[mark a. foltz, 2016-08-25 19:00:59]

Committed patchset #1 (id:1) manually as
6ecece00c2f3b6736fdd4d9a4d92313fa718ad8d.