Fix a bug that document width is set to 0 on prerendering on Android Chrome.

BUG=332025

Review URL: https://codereview.chromium.org/136033012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246410 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246410