Added five Popup Blocker tests.
Added five Popup Blocker tests.

 - testMultiplePopups - verify that multiple popups are blocked.
 - testPopupBlockedEverySec - Verify that popups launched are blocked every second.
 - testPopupsLaunchWhenBrowserBackButton - Verify that popups are launched when the browser back button is pressed.
 - testBlockPopupsFromExternalSite - Verify popups are blocked from an external site.
 - testPopupsLaunchWhenTabIsClosed - Verify that popups are launched when leaving a page.

TEST=none
BUG=none
Review URL: http://codereview.chromium.org/6820006

git-svn-id: http://src.chromium.org/svn/trunk/src@81153 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 94e9d221375a80db1bf6a749401c93d80e584be6
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