Expose RTT and throughput estimates from Cronet

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 {
 
+// RTT and throughput values are set to |INVALID_RTT_THROUGHPUT| if a valid
+// value is unavailable.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.net
+enum RttThroughputValues {
+  // Invalid value.
+  INVALID_RTT_THROUGHPUT = -1,
+};
+
 // 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()|.
+// TODO(tbansal): Remove this method, and replace all calls by
+// |INVALID_RTT_THROUGHPUT|.
 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;
+// TODO(tbansal): Remove this variable, and replace all calls by
+// |INVALID_RTT_THROUGHPUT|.
+const int32_t kInvalidThroughput = INVALID_RTT_THROUGHPUT;
 
 // 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,
@@ skipping 41 matching lines @@
 
   // Estimated downstream throughput in kilobits per second.
   int32_t downstream_throughput_kbps_;
 };
 
 }  // namespace internal
 }  // namespace nqe
 }  // namespace net
 
 #endif  // NET_NQE_NETWORK_QUALITY_H_