Change print preview size to match to media size capability selection and reset margins to default when media size changes.

BUG=139170
NOTRY=true

Review URL: https://codereview.chromium.org/285613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270515 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed