Fix memory leak caused by Rules Registries

This CL resets a scoped_ref_ptr to the WebRequestRulesRegistry in the ExtensionWebRequestEventRouter so that the WebRequestRulesRegistry can be freed.

BUG=122130
TEST=no


Review URL: http://codereview.chromium.org/10076001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132100 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed