Expose RTT and downlink bandwidth using experimental Javascript API

content/renderer/render_thread_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 2108 matching lines @@
     observer.NetworkStateChanged(online);
   WebNetworkStateNotifier::SetWebConnection(
       NetConnectionTypeToWebConnectionType(type), max_bandwidth_mbps);
 }
 
 void RenderThreadImpl::OnNetworkQualityChanged(
     double http_rtt_msec,
     double transport_rtt_msec,
     double downlink_throughput_kbps) {
   UMA_HISTOGRAM_BOOLEAN("NQE.RenderThreadNotified", true);
-  // TODO(tbansal): https://crbug.com/719108. Notify WebNetworkStateNotifier of
-  // the change in the network quality.
+  WebNetworkStateNotifier::SetNetworkQuality(http_rtt_msec, transport_rtt_msec,
+                                             downlink_throughput_kbps);

[kinuko, 2017/05/17 02:05:45]

So we're downcasting double to int here?  Why don't we sent them in
base::TimeDelta?

[tbansal1, 2017/05/17 05:25:26]

Done. Thanks!

 }
 
 void RenderThreadImpl::SetWebKitSharedTimersSuspended(bool suspend) {
 #if defined(OS_ANDROID)
   if (suspend) {
     renderer_scheduler_->SuspendTimerQueue();
   } else {
     renderer_scheduler_->ResumeTimerQueue();
   }
   webkit_shared_timer_suspended_ = suspend;
@@ skipping 301 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content