Split Mandoline-specific components out of mojo:core_services.

Split Mandoline-specific components out of mojo:core_services.

Remove mojo:desktop_ui and mojo:omnibox aliases from core_services.

Note: mojo:desktop_ui wasn't even resolving to mojo://core_services/.
(mojo scheme isn't registered prior to mandoline/app/desktop/main.cc)

Upload the additional mojo:omnibox component with Mandoline binaries.
(mojo:desktop_ui was already being uploaded for the app+resources)

Also, don't build mandoline/ui/phone_ui for Linux desktop builds.

BUG=NONE
TEST=Mandoline still works as intended.
R=ben@chromium.org

Committed: https://crrev.com/be3db595d911b648a3c0f59edd1b052b7e335b45
Cr-Commit-Position: refs/heads/master@{#360963}

[msw, 2015-11-20 23:37:41]

Hey Ben, please take a look; thanks!

[Ben Goodger (Google), 2015-11-20 23:43:48]

lgtm

[msw, 2015-11-20 23:44:13]

The CQ bit was checked by msw@chromium.org

[commit-bot: I haz the power, 2015-11-20 23:45:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1465843003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1465843003/1

[commit-bot: I haz the power, 2015-11-21 00:37:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-21 00:38:46]

Patchset 1 (id:??) landed as
https://crrev.com/be3db595d911b648a3c0f59edd1b052b7e335b45
Cr-Commit-Position: refs/heads/master@{#360963}