Elim. CHECK in ~CertLibraryImpl

The check here was a bad idea in the first place, I didn't think this through carefully enough.

BUG=chromium-os:18677
TEST=Run chrome, open vpn or 8021x connection dialog, quit; ensure chrome does not crash.

Review URL: http://codereview.chromium.org/7578010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95485 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/cros/cert_library.cc

@@ -81,11 +81,9 @@ class CertLibraryImpl
   }
 
   ~CertLibraryImpl() {
-    CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-    if (request_task_) {
-      request_task_->Cancel();
-      request_task_ = NULL;
-    }
+    // CertLibraryImpl is a singleton, so do not attempt to cleanup
+    // request_task_ on destruction.
+    DCHECK(request_task_ == NULL);
     net::CertDatabase::RemoveObserver(this);
   }