Trigger full html.css styles for some printing tests.

Trigger full html.css styles for some printing tests.

In Blink, @page UA styles is missing from the simple html stylesheet which
is used instead of html.css for documents which contains a certain subset
of html element types. Adding that @page rule to that simplified stylesheet
will change the actual results for these tests which have expectations
relying on that bug[1]:

  PrintWebViewHelperPreviewTest.PrintPreviewShrinkToFitPage
  PrintWebViewHelperPreviewTest.PrintPreviewCenterToFitPage

This CL changes the expected results and adds a <p> element to those tests
in order to trigger the correct @page rule from html.css without the fix in
Blink. Then the Blink fix[2] can land and be rolled into chromium without
affecting the results of the mentioned tests.

After the Blink fix is rolled into chromium, the <p> elements can be safely
removed again.

[1] https://code.google.com/p/chromium/issues/detail?id=304021
[2] https://codereview.chromium.org/25856002/

R=vitalybuka@chromium.org
BUG=304021
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=227076

[ojan, 2013-10-04 16:50:44]

lgtm. I don't have owners permission for this directory though.

[Vitaly Buka (NO REVIEWS), 2013-10-04 17:31:13]

lgtm

[commit-bot: I haz the power, 2013-10-04 17:31:42]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rune@opera.com/25446005/1

[commit-bot: I haz the power, 2013-10-04 20:33:30]

Change committed as 227076