[sqlite] Backport icuCaseFunc16 patch from SQLite.

[sqlite] Backport icuCaseFunc16 patch from SQLite.

Original Chromium CL at https://codereview.chromium.org/1704103002

"Fix sqlite3's handling of casemapping result 3 times as long as
input"

SQLite interpretation at
http://www.sqlite.org/src/info/b8dc1b9f5d413000

"Fix a potential buffer overflow in the ICU upper() function."

This is a copy of the CL by shess at
   https://codereview.chromium.org/1746453002/ .

BUG=586079, 594478
TEST=https://jsfiddle.net/ym2nuaj2/3/ (from bug 594478 comment 1)
TBR=shess@chromium.org

Committed: https://crrev.com/a8f7233f06c51fcec01dbacf92dfe7c1ec14c25f
Cr-Commit-Position: refs/heads/master@{#385621}

[jungshik at Google, 2016-04-06 22:27:49]

We want to have this change (that fixes uppercasing/lowercasing of an empty
string) in M50. The original CL has a parent CL blocking it from being landed.
So, I copied it to create a new independent CL for landing.

[jungshik at Google, 2016-04-06 23:04:29]

The CQ bit was checked by jshin@chromium.org

[commit-bot: I haz the power, 2016-04-06 23:06:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1866753005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1866753005/1

[commit-bot: I haz the power, 2016-04-07 02:23:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-07 02:25:35]

Description was changed from

==========
[sqlite] Backport icuCaseFunc16 patch from SQLite.

Original Chromium CL at https://codereview.chromium.org/1704103002

"Fix sqlite3's handling of casemapping result 3 times as long as
input"

SQLite interpretation at
http://www.sqlite.org/src/info/b8dc1b9f5d413000

"Fix a potential buffer overflow in the ICU upper() function."

This is a copy of the CL by shess at
   https://codereview.chromium.org/1746453002/ .

BUG=586079, 594478
TEST=https://jsfiddle.net/ym2nuaj2/3/ (from bug 594478 comment 1)
TBR=shess@chromium.org
==========

to

==========
[sqlite] Backport icuCaseFunc16 patch from SQLite.

Original Chromium CL at https://codereview.chromium.org/1704103002

"Fix sqlite3's handling of casemapping result 3 times as long as
input"

SQLite interpretation at
http://www.sqlite.org/src/info/b8dc1b9f5d413000

"Fix a potential buffer overflow in the ICU upper() function."

This is a copy of the CL by shess at
   https://codereview.chromium.org/1746453002/ .

BUG=586079, 594478
TEST=https://jsfiddle.net/ym2nuaj2/3/ (from bug 594478 comment 1)
TBR=shess@chromium.org

Committed: https://crrev.com/a8f7233f06c51fcec01dbacf92dfe7c1ec14c25f
Cr-Commit-Position: refs/heads/master@{#385621}
==========

[commit-bot: I haz the power, 2016-04-07 02:25:36]

Patchset 1 (id:??) landed as
https://crrev.com/a8f7233f06c51fcec01dbacf92dfe7c1ec14c25f
Cr-Commit-Position: refs/heads/master@{#385621}

[Scott Hess - ex-Googler, 2016-04-11 21:55:55]

lgtm