Fix some new tanslate infobar UI bugs

Fix some UI bugs.
1, Fix hard code always translate value and show correct "always translate" state in the same session.
2, Refresh langauge list every time, in case use changed source/target language.
3, Fix menu button desc under talkback mode.

Tested on my local N5.

BUG=703887
Review-Url: https://codereview.chromium.org/2858013003
Cr-Commit-Position: refs/heads/master@{#469573}
Committed: https://chromium.googlesource.com/chromium/src/+/2233a90a6442f3d4f927cc47df918898edbf4fb2

[Leo, 2017-05-04 06:09:40]

googleo@chromium.org changed reviewers:
+ dfalcantara@chromium.org

[Leo, 2017-05-04 06:09:41]

This small change will fix some bugs.

Tested on my devices.

New test suite for new logic is on the way. Should send out for review in days.

Thanks

[Leo, 2017-05-04 06:31:25]

Description was changed from

==========
Fix 3 UI bugs.
1, Fix hard code always translate value.
2, Show correct "always translate" state in same session.
3, Refresh langauge list every time, in case use changed source/target language.


BUG=703887
==========

to

==========
Fix 3 UI bugs.
1, Fix hard code always translate value.
2, Show correct "always translate" state in same session.
3, Refresh langauge list every time, in case use changed source/target language.
4, Fix menu button desc in talkback mode


BUG=703887
==========

[Leo, 2017-05-04 06:32:32]

Description was changed from

==========
Fix 3 UI bugs.
1, Fix hard code always translate value.
2, Show correct "always translate" state in same session.
3, Refresh langauge list every time, in case use changed source/target language.
4, Fix menu button desc in talkback mode


BUG=703887
==========

to

==========
Fix 3 UI bugs.
1, Fix hard code always translate value.
2, Show correct "always translate" state in same session.
3, Refresh langauge list every time, in case use changed source/target language.
4, Fix menu button desc in talkback mode.

Tested on my local N5.

BUG=703887
==========

[Leo, 2017-05-04 06:33:31]

Description was changed from

==========
Fix 3 UI bugs.
1, Fix hard code always translate value.
2, Show correct "always translate" state in same session.
3, Refresh langauge list every time, in case use changed source/target language.
4, Fix menu button desc in talkback mode.

Tested on my local N5.

BUG=703887
==========

to

==========
Fix some UI bugs.
1, Fix hard code always translate value and show correct "always translate"
state in the same session.
2, Refresh langauge list every time, in case use changed source/target language.
3, Fix menu button desc under talkback mode.

Tested on my local N5.

BUG=703887
==========

[gone, 2017-05-04 17:15:15]

lgtm

[Leo, 2017-05-05 01:24:03]

The CQ bit was checked by googleo@chromium.org

[commit-bot: I haz the power, 2017-05-05 01:24:39]

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, 2017-05-05 02:08:20]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1493947443773050,
"parent_rev": "2e20b0107a76f5a7ff3fd0dac5b0a1a0c4a1fe7b", "commit_rev":
"2233a90a6442f3d4f927cc47df918898edbf4fb2"}

[commit-bot: I haz the power, 2017-05-05 02:09:23]

Description was changed from

==========
Fix some UI bugs.
1, Fix hard code always translate value and show correct "always translate"
state in the same session.
2, Refresh langauge list every time, in case use changed source/target language.
3, Fix menu button desc under talkback mode.

Tested on my local N5.

BUG=703887
==========

to

==========
Fix some UI bugs.
1, Fix hard code always translate value and show correct "always translate"
state in the same session.
2, Refresh langauge list every time, in case use changed source/target language.
3, Fix menu button desc under talkback mode.

Tested on my local N5.

BUG=703887

Review-Url: https://codereview.chromium.org/2858013003
Cr-Commit-Position: refs/heads/master@{#469573}
Committed:
https://chromium.googlesource.com/chromium/src/+/2233a90a6442f3d4f927cc47df91...
==========

[commit-bot: I haz the power, 2017-05-05 02:09:24]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/2233a90a6442f3d4f927cc47df91...