Revert of Quic: add unittests for reduced PING Timeout

net/quic/core/quic_connection.h

Index: net/quic/core/quic_connection.h
diff --git a/net/quic/core/quic_connection.h b/net/quic/core/quic_connection.h
index d5082c50ecb95b4385ad8d038d661d11a9eae605..e4cb2f82735a714c98567178247ecffa5806e0e5 100644
--- a/net/quic/core/quic_connection.h
+++ b/net/quic/core/quic_connection.h
@@ -483,13 +483,11 @@
     debug_visitor_ = debug_visitor;
     sent_packet_manager_->SetDebugDelegate(debug_visitor);
   }
+  void set_ping_timeout(QuicTime::Delta ping_timeout) {
+    ping_timeout_ = ping_timeout;
+  }
+  const QuicTime::Delta ping_timeout() { return ping_timeout_; }
   // Used in Chromium, but not internally.
-  // Must only be called before ping_alarm_ is set.
-  void set_ping_timeout(QuicTime::Delta ping_timeout) {
-    DCHECK(!ping_alarm_->IsSet());
-    ping_timeout_ = ping_timeout;
-  }
-  const QuicTime::Delta ping_timeout() { return ping_timeout_; }
   void set_creator_debug_delegate(QuicPacketCreator::DebugDelegate* visitor) {
     packet_generator_.set_debug_delegate(visitor);
   }