Expose changes in the network quality to the renderers

content/common/renderer.mojom

Index: content/common/renderer.mojom
diff --git a/content/common/renderer.mojom b/content/common/renderer.mojom
index 6c7fb6abb946757b3f8bc5cdb246c0a774c4e9c0..b860044d7414fda2a3b01cd37ca535aeddc844b7 100644
--- a/content/common/renderer.mojom
+++ b/content/common/renderer.mojom
@@ -157,6 +157,14 @@ interface Renderer {
   OnNetworkConnectionChanged(NetworkConnectionType connection_type,
                              double max_bandwidth_mbps);
 
+  // Tells the renderer process that the network quality estimate has changed.
+  // The RTT estimates are in milliseconds, while the downstream throughput is
+  // computed in kilobits per second. If an estimate of the HTTP or transport
+  // RTT is unavailable, it will be set to net::nqe::internal::InvalidRTT(). If
+  // the throughput estimate is unavailable, it will be set to
+  // net::nqe::internal::kInvalidThroughput.
+  OnNetworkQualityChanged(double http_rtt_msec, double transport_rtt_msec, double bandwidth_kbps);
+
   // Tells the renderer to suspend/resume the webkit timers. Only for use on
   // Android.
   SetWebKitSharedTimersSuspended(bool suspend);