Update nss_revision to r168286.

The underlying CL is https://codereview.chromium.org/11420043/.

[email protected]
BUG=153281
TEST=none

Review URL: https://chromiumcodereview.appspot.com/11348100

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168367 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/DEPS b/DEPS
index b7a107c..5909fac8 100644
--- a/DEPS
+++ b/DEPS
@@ -40,7 +40,7 @@
   # and V8 without interference from each other.
   "webrtc_revision": "3088",
   "jsoncpp_revision": "248",
-  "nss_revision": "166832",
+  "nss_revision": "168286",
 }
 
 deps = {