Revert 196325 "Make small-caps work correctly with tr locale"

Revert 196325 "Make small-caps work correctly with tr locale"

Reason for revert: ASAN detected a buffer overflow
The layout test small-caps-turkish.html is flaky, possibly
due to the overflow

https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux_ASAN/18816/layout-test-results/fast/text/small-caps-turkish-crash-log.txt

> Make small-caps work correctly with tr locale
> 
> We correctly support tr upper/lower casing rules 
> for Strings through StringImpl::lower/upper methods
> that take a locale parameter. However for upper/lowering
> case for single Char32, which the small-caps code
> path uses, there is no such overload, so add that to wtf.
> 
> Behavior matches Firefox.
> 
> BUG=395369
> 
> Review URL: https://codereview.chromium.org/1135003004

TBR=rob.buis@samsung.com

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196344

[Justin Novosad, 2015-06-02 20:43:19]

Committed patchset #1 (id:1) manually as r196344.