Roll libjingle to r124 and roll webrtc to 1888.

DEPS

 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://%(repo)s.svn.sourceforge.net/svnroot/%(repo)s",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "110733",
   "chromium_git": "http://git.chromium.org/git",
   "swig_revision": "69281",
@@ skipping 21 matching lines @@
       "c91d3c9b2a221ee3823ece93e0fa129dc6319300",
   "nacl_toolchain_pnacl_translator_hash":
       "e1d54c688e5a9897d33e2dbcadcae68b61adf2e6",
   "nacl_toolchain_win_x86_hash":
       "b02e1d003baba4ac071c41c6dda253cee0907a19",
   "nacl_toolchain_win_x86_newlib_hash":
       "1a64e1a60f398c65d2a5157270996202502d7cc6",
   "nacl_toolchain_revision": "7898",
   "pnacl_toolchain_revision": "7898",
 
-  "libjingle_revision": "119",
+  "libjingle_revision": "124",
   "libphonenumber_revision": "425",
   "libvpx_revision": "125647",
   "lss_revision": "9",
 
   # These two FFmpeg variables must be updated together.  One is used for SVN
   # checkouts and the other for Git checkouts.
   "ffmpeg_revision": "126470",
   "ffmpeg_hash": "ddcf259fa5fb83159d441bd71f54e617e2a4afd3",
 
   "sfntly_revision": "128",
   "skia_revision": "3381",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   "v8_revision": "10875",
-  "webrtc_revision": "1538",
+  "webrtc_revision": "1888",
   "jsoncpp_revision": "248",
   "nss_revision": "126189",
   "rlz_revision": "72",
 }
 
 deps = {
   "src/breakpad/src":
     (Var("googlecode_url") % "google-breakpad") + "/trunk/src@931",
 
   "src/build/util/support":
@@ skipping 448 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/util/lastchange.py",
                "-o", "src/build/util/LASTCHANGE"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]