Expose RTT and downlink bandwidth using experimental Javascript API

third_party/WebKit/Source/modules/netinfo/NetworkInformation.h

Index: third_party/WebKit/Source/modules/netinfo/NetworkInformation.h
diff --git a/third_party/WebKit/Source/modules/netinfo/NetworkInformation.h b/third_party/WebKit/Source/modules/netinfo/NetworkInformation.h
index 5ac714c2bed778ec5f2fd7dbd085b0ccbca6ff6f..0ab041fd3fc415efa72d71000ff5f7edf77dec3e 100644
--- a/third_party/WebKit/Source/modules/netinfo/NetworkInformation.h
+++ b/third_party/WebKit/Source/modules/netinfo/NetworkInformation.h
@@ -29,9 +29,15 @@ class NetworkInformation final
 
   String type() const;
   double downlinkMax() const;
+  long rtt() const;
+  double downlink() const;
 
   // NetworkStateObserver overrides.
-  void ConnectionChange(WebConnectionType, double downlink_max_mbps) override;
+  void ConnectionChange(WebConnectionType,
+                        double downlink_max_mbps,
+                        int http_rtt_msec,
+                        int transport_rtt_msec,
+                        double downlink_mbps) override;
 
   // EventTarget overrides.
   const AtomicString& InterfaceName() const override;
@@ -67,6 +73,14 @@ class NetworkInformation final
   // Touched only on context thread.
   double downlink_max_mbps_;
 
+  // Transport RTT estimate. Rounded off to the nearest 25 msec. Touched only on
+  // context thread.
+  int transport_rtt_msec_;
+
+  // Downlink throughput estimate. Rounded off to the nearest 25 kbps. Touched
+  // only on context thread.
+  double downlink_mbps_;
+
   // Whether this object is listening for events from NetworkStateNotifier.
   bool observing_;