[Custom Tabs]Fix a bug that https is not shown properly

[Custom Tabs]Fix a bug that https is not shown properly

In android SDK M, android:maxLines no longer works with setSelection. If
selection is set to the end, TextView will squeeze the first part to a
previous line. This CL changes the urlbar in Custom Tab to use
singleLine.

BUG=524672
Committed: https://crrev.com/9098c6ed41aed678e27a995b1499790a140b1e9c
Cr-Commit-Position: refs/heads/master@{#345530}

[Ian Wen, 2015-08-26 01:46:49]

ianwen@chromium.org changed reviewers:
+ yusufo@chromium.org

[Yusuf, 2015-08-26 01:49:27]

lgtm

lgtm

[Ian Wen, 2015-08-26 01:54:34]

The CQ bit was checked by ianwen@chromium.org

[commit-bot: I haz the power, 2015-08-26 01:54:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1320493003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1320493003/1

[commit-bot: I haz the power, 2015-08-26 02:45:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-26 02:46:16]

Patchset 1 (id:??) landed as
https://crrev.com/9098c6ed41aed678e27a995b1499790a140b1e9c
Cr-Commit-Position: refs/heads/master@{#345530}