Disk cache: Remove the check for no open entries at destruction if we are not running a net_unittest.
Disk cache: Remove the check for no open entries at destruction
if we are not running a net_unittest.

We have no way to enforce that the browser closes all
backend entries (HttpCacheTransactions) before deleting the cache.

BUG=52366
TEST=none


Review URL: http://codereview.chromium.org/3119039

git-svn-id: http://src.chromium.org/svn/trunk/src@57422 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: c2dc1eda7b51911c81e1e1ec1abcf92084bf3254
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