Fixed return value in PrintingContext::OnError().

TBR=noamsml
BUG=374321

Review URL: https://codereview.chromium.org/484373002

Cr-Commit-Position: refs/heads/master@{#290759}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290759 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed