Update client side navigator.connect API to use ServicePortCollection [3/3]

Update client side navigator.connect API to use ServicePortCollection [3/3]

This is part of a series of patches to update the client side API of what was
formerly known as navigator.connect to follow the new spec based on
navigator.services and a new ServicePort type.

This patch removes the old client side API from blink, and removes now
redundant code from the layout tests.

[1/3] https://codereview.chromium.org/1191393003 Blink side changes
[2/3] https://codereview.chromium.org/1192713004 Content side changes
[3/3] https://codereview.chromium.org/1198653004 This patch

BUG=426458
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=198024

[Marijn Kruisselbrink, 2015-06-22 17:42:04]

Patchset #1 (id:1) has been deleted

[Marijn Kruisselbrink, 2015-06-22 17:42:09]

Patchset #1 (id:20001) has been deleted

[Marijn Kruisselbrink, 2015-06-22 17:48:53]

mek@chromium.org changed reviewers:
+ scheib@chromium.org

[scheib, 2015-06-24 23:07:16]

LGTM

[Marijn Kruisselbrink, 2015-06-29 20:31:44]

mek@chromium.org changed reviewers:
+ japhet@chromium.org

[Marijn Kruisselbrink, 2015-06-29 20:31:45]

+japhet for public/ OWNERS

[Nate Chapin, 2015-06-29 20:51:09]

lgtm

[Marijn Kruisselbrink, 2015-06-29 21:45:14]

The CQ bit was checked by mek@chromium.org

[Marijn Kruisselbrink, 2015-06-29 21:45:15]

The patchset sent to the CQ was uploaded after l-g-t-m from scheib@chromium.org
Link to the patchset: https://codereview.chromium.org/1198653004/#ps60001
(title: "rebase")

[commit-bot: I haz the power, 2015-06-29 21:45:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1198653004/60001

[commit-bot: I haz the power, 2015-06-29 22:14:13]

Committed patchset #2 (id:60001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=198024