Expose RTT and downlink bandwidth using experimental Javascript API

third_party/WebKit/Source/platform/network/NetworkStateNotifier.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 33 matching lines @@
   USING_FAST_MALLOC(NetworkStateNotifier);
 
  public:
   struct NetworkState {
     static const int kInvalidMaxBandwidth = -1;
     bool on_line_initialized = false;
     bool on_line = true;
     bool connection_initialized = false;
     WebConnectionType type = kWebConnectionTypeOther;
     double max_bandwidth_mbps = kInvalidMaxBandwidth;
+    int http_rtt_msec = -1;
+    int transport_rtt_msec = -1;
+    double downlink_throughput_mbps = -1;
   };
 
   class NetworkStateObserver {
    public:
     // Will be called on the task runner that is passed in add*Observer.
     virtual void ConnectionChange(WebConnectionType,
-                                  double max_bandwidth_mbps) {}
+                                  double max_bandwidth_mbps,
+                                  int http_rtt_msec,
+                                  int transport_rtt_msec,
+                                  double downlink_throughput_mbps) {}
     virtual void OnLineStateChange(bool on_line) {}
   };
 
   NetworkStateNotifier() : has_override_(false) {}
 
   // Can be called on any thread.
   bool OnLine() const {
     MutexLocker locker(mutex_);
     const NetworkState& state = has_override_ ? override_ : state_;
     DCHECK(state.on_line_initialized);
     return state.on_line;
   }
 
+  int HttpRttMsec() const {
+    MutexLocker locker(mutex_);
+    const NetworkState& state = has_override_ ? override_ : state_;
+    DCHECK(state.on_line_initialized);
+    return state.http_rtt_msec;
+  }
+
+  int TransportRttMsec() const {
+    MutexLocker locker(mutex_);
+    const NetworkState& state = has_override_ ? override_ : state_;
+    DCHECK(state.on_line_initialized);
+    return state.transport_rtt_msec;
+  }
+
+  double DownlinkThroughputMbps() const {
+    MutexLocker locker(mutex_);
+    const NetworkState& state = has_override_ ? override_ : state_;
+    DCHECK(state.on_line_initialized);
+    return state.downlink_throughput_mbps;
+  }
+
   void SetOnLine(bool);
 
   // Can be called on any thread.
   WebConnectionType ConnectionType() const {
     MutexLocker locker(mutex_);
     const NetworkState& state = has_override_ ? override_ : state_;
     DCHECK(state.connection_initialized);
     return state.type;
   }
 
@@ skipping 19 matching lines @@
 
   // Can be called on any thread.
   double MaxBandwidth() const {
     MutexLocker locker(mutex_);
     const NetworkState& state = has_override_ ? override_ : state_;
     DCHECK(state.connection_initialized);
     return state.max_bandwidth_mbps;
   }
 
   void SetWebConnection(WebConnectionType, double max_bandwidth_mbps);
+  void SetWebNetworkQuality(int http_rtt_msec,
+                            int transport_rtt_msec,
+                            int downlink_throughput_kbps);
 
   // When called, successive setWebConnectionType/setOnLine calls are stored,
   // and supplied overridden values are used instead until clearOverride() is
   // called.  This is used for layout tests (see crbug.com/377736) and inspector
   // emulation.
   //
   // Since this class is a singleton, tests must clear override when completed
   // to avoid indeterminate state across the test harness.
   void SetOverride(bool on_line, WebConnectionType, double max_bandwidth_mbps);
   void ClearOverride();
@@ skipping 70 matching lines @@
 
   ObserverListMap connection_observers_;
   ObserverListMap on_line_state_observers_;
 };
 
 PLATFORM_EXPORT NetworkStateNotifier& GetNetworkStateNotifier();
 
 }  // namespace blink
 
 #endif  // NetworkStateNotifier_h