Pulls out QuicConnection alarm cancellation into method. No behavior change.

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index ab6ee9ca7b46d98fc6bbd628b9d895135d3a30e0..dada5a195da490577dbfec21b0e3b059476b0ea6 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -680,6 +680,9 @@ class NET_EXPORT_PRIVATE QuicConnection
   }
 
  protected:
+  // Calls cancel() on all the alarms owned by this connection.
+  void CancelAllAlarms();
+
   // Send a packet to the peer, and takes ownership of the packet if the packet
   // cannot be written immediately.
   virtual void SendOrQueuePacket(SerializedPacket* packet);