Factor out NetworkID and caching mechanism from n_q_e.{h,cc}

net/nqe/network_quality.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_NQE_NETWORK_QUALITY_H_
 #define NET_NQE_NETWORK_QUALITY_H_
 
 #include <stdint.h>
 
 #include "base/gtest_prod_util.h"
@@ skipping 25 matching lines @@
   // layer. |downstream_throughput_kbps| is the estimate of the downstream
   // throughput in kilobits per second.
   NetworkQuality(const base::TimeDelta& http_rtt,
                  const base::TimeDelta& transport_rtt,
                  int32_t downstream_throughput_kbps);
   NetworkQuality(const NetworkQuality& other);
   ~NetworkQuality();
 
   NetworkQuality& operator=(const NetworkQuality& other);
 
+  bool operator==(const NetworkQuality& other) const;
+
   // Returns the estimate of the round trip time at the HTTP layer.
   const base::TimeDelta& http_rtt() const { return http_rtt_; }
 
   void set_http_rtt(const base::TimeDelta& http_rtt) { http_rtt_ = http_rtt; }
 
   // Returns the estimate of the round trip time at the transport layer.
   const base::TimeDelta& transport_rtt() const { return transport_rtt_; }
 
   void set_transport_rtt(const base::TimeDelta& transport_rtt) {
     transport_rtt_ = transport_rtt;
@@ skipping 20 matching lines @@
   int32_t downstream_throughput_kbps_;
 };
 
 }  // namespace internal
 
 }  // namespace nqe
 
 }  // namespace net
 
 #endif  // NET_NQE_NETWORK_QUALITY_H_