Adding an end-to-end connection time test.

webrtc/p2p/base/transport.h

Index: webrtc/p2p/base/transport.h
diff --git a/webrtc/p2p/base/transport.h b/webrtc/p2p/base/transport.h
index 92698915773f5688dfcdec10473da2f684201090..f2b2660be54fbdcbbe41d01514dd8bdf26a7efd0 100644
--- a/webrtc/p2p/base/transport.h
+++ b/webrtc/p2p/base/transport.h
@@ -172,7 +172,7 @@ struct IceConfig {
 
   // If set to true, this means the ICE transport should presume TURN-to-TURN
   // candidate pairs will succeed, even before a binding response is received.
-  bool presume_writable_when_fully_relayed = false;
+  bool presume_writable_when_fully_relayed = true;
 
   IceConfig() {}
   IceConfig(int receiving_timeout_ms,
@@ -188,8 +188,7 @@ struct IceConfig {
             prioritize_most_likely_candidate_pairs),
         stable_writable_connection_ping_interval(
             stable_writable_connection_ping_interval_ms),
-        presume_writable_when_fully_relayed(
-            presume_writable_when_fully_relayed) {}
+        presume_writable_when_fully_relayed(true) {}
 };
 
 bool BadTransportDescription(const std::string& desc, std::string* err_desc);