Revert 236409 "Fix autofill popup size."

> Fix autofill popup size.
> 
> This is expanded to 64 pixels tall so that it will be presented correctly, but we want to avoid telling the content about that.
> 
> BUG=320974
> 
> Review URL: https://codereview.chromium.org/69343016

TBR=jbauman@chromium.org

Review URL: https://codereview.chromium.org/80423002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236456 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236456