Revert 160706 "make input type="search" RTL direction aware."

We don't decide what we should do yet, and the implementation of
r160706 is wrong.

> make input type="search" RTL direction aware.
> 
> Swap the positions of cancel button and search icon if dir="rtl".
> 
> BUG=232333
> 
> Review URL: https://codereview.chromium.org/27323002

TBR=sanjoy.pal@samsung.com

Review URL: https://codereview.chromium.org/47603004

git-svn-id: svn://svn.chromium.org/blink/trunk@160709 bbb929c8-8fbe-4397-9dbb-9b2b20218538