Revert of Preserve autosizing multiplier on style recalc. (https://codereview.chromium.org/208393008/)

Reason for revert:
This might have caused android tests failure: 
http://build.chromium.org/p/chromium.webkit/builders/Android%20Tests%20%28dbg...
Speculatively reverting it.

Original issue's description:
> Preserve autosizing multiplier on style recalc.
> 
> BUG=353309
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169961

TBR=pdr@chromium.org,esprehn@chromium.org,skobes@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=353309

Review URL: https://codereview.chromium.org/212163006

git-svn-id: svn://svn.chromium.org/blink/trunk@170050 bbb929c8-8fbe-4397-9dbb-9b2b20218538