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"
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "net/base/net_export.h"
 
 namespace net {
-
 namespace nqe {
-
 namespace internal {
 
 // Returns the RTT value to be used when the valid RTT is unavailable. Readers
 // should discard RTT if it is set to the value returned by |InvalidRTT()|.
 NET_EXPORT_PRIVATE base::TimeDelta InvalidRTT();
 
 // Throughput is set to |kInvalidThroughput| if a valid value is
 // unavailable. Readers should discard throughput value if it is set to
 // |kInvalidThroughput|.
 const int32_t kInvalidThroughput = 0;
 
 // NetworkQuality is used to cache the quality of a network connection.
 class NET_EXPORT_PRIVATE NetworkQuality {
  public:
   NetworkQuality();
   // |http_rtt| is the estimate of the round trip time at the HTTP layer.
   // |transport_rtt| is the estimate of the round trip time at the transport
   // 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 14 matching lines @@
   base::TimeDelta http_rtt_;
 
   // Estimated round trip time at the transport layer.
   base::TimeDelta transport_rtt_;
 
   // Estimated downstream throughput in kilobits per second.
   int32_t downstream_throughput_kbps_;
 };
 
 }  // namespace internal
-
 }  // namespace nqe
-
 }  // namespace net
 
 #endif  // NET_NQE_NETWORK_QUALITY_H_