[Media Router UI] Fix route-details/sink-list view flashing.

[Media Router UI] Fix route-details/sink-list view flashing.

If the dialog is initially in route-details view, and the route is
closed before the 3s startup timer fires, then the dialog will flash
between the route-details and sink-list view before settling on
sink-list. See bug for details.

The fix is to only allow maybeShowRouteDetailsOnOpen to be invoked
once, on startup. It is removed from |rebuildRouteMaps_| and is now
called from setInitialData. Also removed |localRouteCount_| field from
media-router-container since it's no longer needed.

BUG=571463
Committed: https://crrev.com/ce8a324e712484eb866dfaa4d9b904de0a68f242
Cr-Commit-Position: refs/heads/master@{#367031}

[imcheng, 2015-12-21 20:49:24]

imcheng@chromium.org changed reviewers:
+ apacible@chromium.org

[apacible, 2015-12-21 23:36:48]

Thanks for investigating! lgtm

[imcheng, 2015-12-28 21:06:24]

The CQ bit was checked by imcheng@chromium.org

[imcheng, 2015-12-28 21:06:24]

The patchset sent to the CQ was uploaded after l-g-t-m from
apacible@chromium.org
Link to the patchset: https://codereview.chromium.org/1538363003/#ps60001
(title: "fix tests")

[commit-bot: I haz the power, 2015-12-28 21:06:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1538363003/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1538363003/60001

[commit-bot: I haz the power, 2015-12-28 22:38:08]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-12-28 22:38:08]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[imcheng, 2015-12-28 23:02:03]

The CQ bit was checked by imcheng@chromium.org

[commit-bot: I haz the power, 2015-12-28 23:03:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1538363003/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1538363003/60001

[commit-bot: I haz the power, 2015-12-29 00:35:17]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-12-29 00:36:08]

Description was changed from

==========
[Media Router UI] Fix route-details/sink-list view flashing.

If the dialog is initially in route-details view, and the route is
closed before the 3s startup timer fires, then the dialog will flash
between the route-details and sink-list view before settling on
sink-list. See bug for details.

The fix is to only allow maybeShowRouteDetailsOnOpen to be invoked
once, on startup. It is removed from |rebuildRouteMaps_| and is now
called from setInitialData. Also removed |localRouteCount_| field from
media-router-container since it's no longer needed.

BUG=571463
==========

to

==========
[Media Router UI] Fix route-details/sink-list view flashing.

If the dialog is initially in route-details view, and the route is
closed before the 3s startup timer fires, then the dialog will flash
between the route-details and sink-list view before settling on
sink-list. See bug for details.

The fix is to only allow maybeShowRouteDetailsOnOpen to be invoked
once, on startup. It is removed from |rebuildRouteMaps_| and is now
called from setInitialData. Also removed |localRouteCount_| field from
media-router-container since it's no longer needed.

BUG=571463

Committed: https://crrev.com/ce8a324e712484eb866dfaa4d9b904de0a68f242
Cr-Commit-Position: refs/heads/master@{#367031}
==========

[commit-bot: I haz the power, 2015-12-29 00:36:08]

Patchset 4 (id:??) landed as
https://crrev.com/ce8a324e712484eb866dfaa4d9b904de0a68f242
Cr-Commit-Position: refs/heads/master@{#367031}