Revert of HTMLSelectElement does not include selected index/indices while saving state (patchset #8 id:160001 of https://codereview.chromium.org/541693003/)

Reason for revert:
Looks like this test crashes consistently on Android Tests (dbg) starting at this build:
http://build.chromium.org/p/chromium.webkit/builders/Android%20Tests%20%28dbg%29/builds/21459


Original issue's description:
> HTMLSelectElement does not include selected index/indices while saving state
> 
> Since index is not part of the FormControl state for select, there is no
> way to restore it to proper index if there are duplicate values. This
> patch includes the index in the FormControl state for select.
> 
> BUG=401506
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181883

TBR=tkent@chromium.org,keishi@chromium.org,sudarshan.p@samsung.com
NOTREECHECKS=true
NOTRY=true
BUG=401506

Review URL: https://codereview.chromium.org/566913002

git-svn-id: svn://svn.chromium.org/blink/trunk@181911 bbb929c8-8fbe-4397-9dbb-9b2b20218538