NetInfo: Slight update to the default network quality value

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

 // Copyright 2014 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 "modules/netinfo/NetworkInformation.h"
 
 #include <limits>
 
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/TaskRunnerHelper.h"
@@ skipping 59 matching lines @@
   if (rtt.value().InMilliseconds() > std::numeric_limits<int>::max())
     rtt_msec = std::numeric_limits<int>::max();
 
   DCHECK_LE(0, rtt_msec);
   return std::round(static_cast<double>(rtt_msec) / 25) * 25;
 }
 
 // Rounds |downlink_mbps| to the nearest 25 kbps as per the NetInfo spec. The
 // returned value is in Mbps.
 double RoundMbps(const Optional<double>& downlink_mbps) {
+  double downlink_kbps = 0;
   if (!downlink_mbps.has_value()) {
     // Throughput is unavailable. So, return the fastest value.
-    return std::numeric_limits<double>::infinity();
+    downlink_kbps = (std::numeric_limits<double>::max());
+  } else {
+    downlink_kbps = downlink_mbps.value() * 1000;
   }
 
-  DCHECK_LE(0, downlink_mbps.value());
-  double downlink_kbps = downlink_mbps.value() * 1000;
+  DCHECK_LE(0, downlink_kbps);
   double downlink_kbps_rounded = std::round(downlink_kbps / 25) * 25;
   return downlink_kbps_rounded / 1000;
 }
 
 }  // namespace
 
 NetworkInformation* NetworkInformation::Create(ExecutionContext* context) {
   return new NetworkInformation(context);
 }
 
@@ skipping 150 matching lines @@
           RoundMbps(GetNetworkStateNotifier().DownlinkThroughputMbps())),
       observing_(false),
       context_stopped_(false) {}
 
 DEFINE_TRACE(NetworkInformation) {
   EventTargetWithInlineData::Trace(visitor);
   ContextLifecycleObserver::Trace(visitor);
 }
 
 }  // namespace blink