Bug 1426367 - Turn on TFO for Windows. r=hurley

modules/libpref/init/all.js

@@ -4782,7 +4782,11 @@ pref("network.tcp.keepalive.retry_interval", 1); // seconds
 pref("network.tcp.keepalive.probe_count", 4);
 #endif
 
+#if defined(XP_WIN)
+pref("network.tcp.tcp_fastopen_enable", true);
+#else
 pref("network.tcp.tcp_fastopen_enable", false);
+#endif
 pref("network.tcp.tcp_fastopen_consecutive_failure_limit", 5);
 // We are trying to detect stalled tcp connections that use TFO and TLS
 // (bug 1395494).

netwerk/protocol/http/nsHttpConnectionMgr.cpp

@@ -4584,7 +4584,6 @@ nsHalfOpenSocket::SetFastOpenConnected(nsresult aError, bool aWillRetry)
     mConnectionNegotiatingFastOpen = nullptr;
     if (mEnt) {
         mEnt->mDoNotDestroy = false;
-        MOZ_ASSERT(mEnt->mHalfOpens.Contains(this));
     } else {
         MOZ_ASSERT(!mSynTimer);
         MOZ_ASSERT(!mBackupTransport);