Top-level pages should show left-navigation.

The new left-nav wasn't showing up for the top-level parents. This is because there's a dependency between the selected item, and showing the selected item's child elements in the navigation.

Adding redirects is a quick solution. But we should tweak the logic for rendering the navigation to do this better. Created a bug to make this happen: https://code.google.com/p/chromium/issues/detail?id=449272

I also added the nativeMessaging article to chrome_sidenav.json so it's not an orphan page (and so it gets a left-side navigation).

BUG=447853
Committed: https://crrev.com/7dbc1428fa4363ff47972c2076cd4395e05e9440
Cr-Commit-Position: refs/heads/master@{#311775}

[mkearney1, 2015-01-15 21:17:01]

mkearney@chromium.org changed reviewers:
+ binji@chromium.org, paulirish@chromium.org, rockot@chromium.org

[mkearney1, 2015-01-15 21:18:24]

Iterating on navigation to make it better (this is likely to go on for a bit).

[paulirish, 2015-01-15 23:27:10]

lgtm. i'm OK with the redirects as a quick solution.

love the new left-nav.

[Ken Rockot(use gerrit already), 2015-01-15 23:37:10]

lgtm

[mkearney1, 2015-01-15 23:41:01]

The CQ bit was checked by mkearney@chromium.org

[commit-bot: I haz the power, 2015-01-15 23:42:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/849303003/20001

[commit-bot: I haz the power, 2015-01-16 00:32:25]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-16 00:34:13]

Patchset 2 (id:??) landed as
https://crrev.com/7dbc1428fa4363ff47972c2076cd4395e05e9440
Cr-Commit-Position: refs/heads/master@{#311775}