Cloud Print Proxy error handling.
Cloud Print Proxy error handling.

StartDoc returns <= 0 on failure, including when the user cancels out
of the save dialog on Windows 7.

BUG=none
TEST=Print to the Windows XPS printer, when the proxy brings up the save dialog, cancel.  Proxy should stay running.

Review URL: http://codereview.chromium.org/3546001

git-svn-id: http://src.chromium.org/svn/trunk/src@60875 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 3d3286ce798da7fa7fd3d92fd7b56b86a1c2b46d
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser