Add a test for the disposition of session restored tabs
Follow on for https://src.chromium.org/viewvc/chrome?revision=218548
which fixed various background tab issues related to visibility (see
for example bugs 118269, 142061, 155365 and 272962). Add a test case
for session restored tabs.
TEST=browser_tests --gtest_filter="SessionRestore*TabsHaveCorrectVisibilityState"
BUG=118269
Review URL: https://codereview.chromium.org/
258283004
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267371 0039d316-1c4b-4281-b951-d872f2087c98