Roll libjingle 168:170.

- Start gathering ice candidates before user sets local description.
- Support for muting individual streams based on SSRC.

Review URL: https://chromiumcodereview.appspot.com/10825344

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151663 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -18,7 +18,7 @@ vars = {
   "nacl_tools_revision": "9330",  # native_client/DEPS: tools_rev
   "gtm_revision": "534",
 
-  "libjingle_revision": "168",
+  "libjingle_revision": "170",
   "libphonenumber_revision": "456",
   "libvpx_revision": "150392",
   "lss_revision": "11",

third_party/libjingle/README.chromium

@@ -2,7 +2,7 @@ Name: Libjingle library. Used for p2p voice and video communication.
 Short Name: libjingle
 URL: http://code.google.com/p/libjingle/
 Version: unknown
-Revision: 165
+Revision: 170
 License: BSD
 License File: source/COPYING
 Security Critical: yes