Introduce printing test case (Step 1)...

Introduce printing test case (Step 1)

This CL will just show how to actually execute a full print process from start
to finish. It will verify that a page has been printed (successfully).

In the next steps, we would need to test whether the elements rendered after
printing are correct. (how?)

And fixed some lint errors. Thanks for hbono and maruel to lead me in the right
direction :)

Original patch by Mohamed Mansour (see http://codereview.chromium.org/67036/show), r=me,maruel,sverrir.

BUG=?

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=13831