Fix text alignment issue in Chrome iOS' omnibox.

Fix text alignment issue in Chrome iOS' omnibox.

|preEditTextAlignment| does not need to honor RTL, as URLs are always left aligned.

BUG=575181
Review-Url: https://codereview.chromium.org/2937713002
Cr-Commit-Position: refs/heads/master@{#479701}
Committed: https://chromium.googlesource.com/chromium/src/+/f54107635ab356843ffa12e9d38682408ea00ffe

[justincohen, 2017-06-13 15:31:32]

Description was changed from

==========
Fix text alignment issue in Chrome iOS' omnibox.

|preEditTextAlignment| was expecting |bestTextAlignment| to either return a
right
alignment or a left alignment, but |bestTextAlignment| was sometimes
returning NSTextAlignmentNatural.

Swiping down the omnibox_popup_view triggered the bug because it results in a
call to |HideKeyboard|, which calls |resignFirstResponder|, which triggers a
relayout of the omnibox UITextField.

BUG=575181
==========

to

==========
Fix text alignment issue in Chrome iOS' omnibox.

|preEditTextAlignment| does not need to honor RTL, as URLs are always left
aligned.

BUG=575181
==========

[justincohen, 2017-06-13 15:31:32]

justincohen@chromium.org changed reviewers:
+ jif@chromium.org, rohitrao@chromium.org

[rohitrao (ping after 24h), 2017-06-15 14:47:27]

lgtm

[justincohen, 2017-06-15 14:47:57]

The CQ bit was checked by justincohen@chromium.org

[commit-bot: I haz the power, 2017-06-15 14:48:14]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-15 15:00:58]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497538077620200, "parent_rev":
"032e2b23f44081983a42658ea5551acca8ca1cd2", "commit_rev":
"f54107635ab356843ffa12e9d38682408ea00ffe"}

[commit-bot: I haz the power, 2017-06-15 15:01:11]

Description was changed from

==========
Fix text alignment issue in Chrome iOS' omnibox.

|preEditTextAlignment| does not need to honor RTL, as URLs are always left
aligned.

BUG=575181
==========

to

==========
Fix text alignment issue in Chrome iOS' omnibox.

|preEditTextAlignment| does not need to honor RTL, as URLs are always left
aligned.

BUG=575181

Review-Url: https://codereview.chromium.org/2937713002
Cr-Commit-Position: refs/heads/master@{#479701}
Committed:
https://chromium.googlesource.com/chromium/src/+/f54107635ab356843ffa12e9d386...
==========

[commit-bot: I haz the power, 2017-06-15 15:01:14]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/f54107635ab356843ffa12e9d386...