Expose GetLineSeparatorForLanguage in address_formatter.h

Expose GetLineSeparatorForLanguage in address_formatter.h

Chromium uses the separator to collapse multi-line parts of autofill
profile into a single line, street address lines, names, emails, and
phone numbers.

TBR=lararennie@google.com

Committed: https://code.google.com/p/libaddressinput/source/detail?r=305

[Rouslan Solomakhin, 2014-07-12 01:35:41]

FYI.

[Rouslan Solomakhin, 2014-07-12 01:36:09]

Committed patchset #1 manually as r305 (presubmit successful).

[lararennie, 2014-07-14 07:40:02]

I'm a bit concerned about this CL.
a) This shouldn't be used to concatenate phone numbers!
b) This shouldn't be used to concatenate many other things
c) ICU has a list separator that should be used instead for many of these
use-cases.

Anything with addresses should already be covered; or anything that isn't we can
add an API for that.

This is a "line separator" for *addresses* in particular, not just in general.

[Rouslan Solomakhin, 2014-07-14 14:39:24]

Filed https://code.google.com/p/chromium/issues/detail?id=393584 to fix the
issue in Chrome, after which we can revert this patch.

[Rouslan Solomakhin, 2014-07-14 17:14:50]

Chrome CL @ https://codereview.chromium.org/390083003/

[Rouslan Solomakhin, 2014-07-17 03:44:13]

Reverted in https://code.google.com/p/libaddressinput/source/detail?r=306.
Chromium switched from GetLineSeparatorForLanguage to
GetStreetAddressLinesAsSingleLine.

[roubert (google), 2014-07-17 23:22:10]

I've now verified the revert.

LGTM