Change the size of the ICE ufrag to 4 bytes.
This is the minumum allowed size, and will allow STUN pings to be smaller.
The unit tests on the the Gturn are also modified. A username with length of 16 bytes will be generated for Gturn only.
Review-Url: https://codereview.webrtc.org/1848083002
Cr-Commit-Position: refs/heads/master@{#12876}
diff --git a/webrtc/p2p/client/basicportallocator_unittest.cc b/webrtc/p2p/client/basicportallocator_unittest.cc
index 024f46f..6cd40ea 100644
--- a/webrtc/p2p/client/basicportallocator_unittest.cc
+++ b/webrtc/p2p/client/basicportallocator_unittest.cc
@@ -64,7 +64,7 @@
static const int kMaxPort = 10099;
// Based on ICE_UFRAG_LENGTH
-static const char kIceUfrag0[] = "TESTICEUFRAG0000";
+static const char kIceUfrag0[] = "UF00";
// Based on ICE_PWD_LENGTH
static const char kIcePwd0[] = "TESTICEPWD00000000000000";