Fix case mapping buffer length divergence for synthetic caps

Fix case mapping buffer length divergence for synthetic caps

And provide locale to case WTF::String's upper implementation, which is
based on ICU transliterators. This fix handles all cases of Unicode's
SpecialCasing.txt case mapping rules list where the base character is
extended to two or more characters after case mapping, except those
cases where context is required. The latter case is tracked in
crbug.com/623940 and depends on ICU streaming uppercase API support.

Fix by adding multiple characters after case mapping to the same
HarfBuzz cluster index, which is nicely compatible with our previous
approaches for shaping result extraction, text selection, etc.

BUG=589335, 605067
R=eae,behdad

Committed: https://crrev.com/de2db20f1ddb41f0c8de88ab9d376cbf40769a0c
Cr-Commit-Position: refs/heads/master@{#402782}

[drott, 2016-06-28 15:33:22]

The CQ bit was checked by drott@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-06-28 15:33:36]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[eae, 2016-06-28 16:04:11]

OK, LGTM

[commit-bot: I haz the power, 2016-06-28 16:27:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-06-28 16:27:47]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[behdad, 2016-06-28 22:07:16]

lgtm

[drott, 2016-06-29 10:48:47]

The CQ bit was checked by drott@chromium.org

[drott, 2016-06-29 10:48:48]

The patchset sent to the CQ was uploaded after l-g-t-m from eae@chromium.org,
behdad@chromium.org
Link to the patchset: https://codereview.chromium.org/2102113002/#ps20001
(title: "Turkish test is a progression, rebaselining, Moving comment up in test
case")

[commit-bot: I haz the power, 2016-06-29 10:49:13]

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, 2016-06-29 12:01:20]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-06-29 12:02:50]

Description was changed from

==========
Fix case mapping buffer length divergence for synthetic caps

And provide locale to case WTF::String's upper implementation, which is
based on ICU transliterators. This fix handles all cases of Unicode's
SpecialCasing.txt case mapping rules list where the base character is
extended to two or more characters after case mapping, except those
cases where context is required. The latter case is tracked in
crbug.com/623940 and depends on ICU streaming uppercase API support.

Fix by adding multiple characters after case mapping to the same
HarfBuzz cluster index, which is nicely compatible with our previous
approaches for shaping result extraction, text selection, etc.

BUG=589335,605067
R=eae,behdad
==========

to

==========
Fix case mapping buffer length divergence for synthetic caps

And provide locale to case WTF::String's upper implementation, which is
based on ICU transliterators. This fix handles all cases of Unicode's
SpecialCasing.txt case mapping rules list where the base character is
extended to two or more characters after case mapping, except those
cases where context is required. The latter case is tracked in
crbug.com/623940 and depends on ICU streaming uppercase API support.

Fix by adding multiple characters after case mapping to the same
HarfBuzz cluster index, which is nicely compatible with our previous
approaches for shaping result extraction, text selection, etc.

BUG=589335,605067
R=eae,behdad

Committed: https://crrev.com/de2db20f1ddb41f0c8de88ab9d376cbf40769a0c
Cr-Commit-Position: refs/heads/master@{#402782}
==========

[commit-bot: I haz the power, 2016-06-29 12:02:51]

Patchset 2 (id:??) landed as
https://crrev.com/de2db20f1ddb41f0c8de88ab9d376cbf40769a0c
Cr-Commit-Position: refs/heads/master@{#402782}