Wrapping blocked filesystems into TabSpecificContentSettings

BUG=63703
TEST=TabSpecificContentSettings* in `unit_tests`


Review URL: http://codereview.chromium.org/6966036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@87006 0039d316-1c4b-4281-b951-d872f2087c98
13 files changed