Remove use of PORTALLOCATOR_ENABLE_SHARED_UFRAG

This flag is a no-op in WebRTC.

Bug: None
Change-Id: I2342618483bdd9b0458962c3773b98e9d28380ab
Reviewed-on: https://chromium-review.googlesource.com/1011394Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550686}

remoting/protocol/port_allocator.cc

@@ -60,7 +60,6 @@ PortAllocator::PortAllocator(
   // may end up removing mobile networks when no WiFi is available. We may want
   // to add this flag only if there is WiFi interface.
   int flags = cricket::PORTALLOCATOR_DISABLE_TCP |
-              cricket::PORTALLOCATOR_ENABLE_SHARED_UFRAG |
               cricket::PORTALLOCATOR_ENABLE_IPV6 |
               cricket::PORTALLOCATOR_ENABLE_IPV6_ON_WIFI;
 

remoting/test/fake_port_allocator.cc

@@ -51,7 +51,6 @@ FakePortAllocator::FakePortAllocator(
     : BasicPortAllocator(network_manager, socket_factory),
       transport_context_(transport_context) {
   set_flags(cricket::PORTALLOCATOR_DISABLE_TCP |
-            cricket::PORTALLOCATOR_ENABLE_SHARED_UFRAG |
             cricket::PORTALLOCATOR_ENABLE_IPV6 |
             cricket::PORTALLOCATOR_DISABLE_STUN |
             cricket::PORTALLOCATOR_DISABLE_RELAY);