Update from https://crrev.com/308996

net/base/network_change_notifier.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 "net/base/network_change_notifier.h"
 
 #include <limits>
 
 #include "base/metrics/histogram.h"
 #include "base/synchronization/lock.h"
@@ skipping 670 matching lines @@
 }
 
 void NetworkChangeNotifier::AddNetworkChangeObserver(
     NetworkChangeObserver* observer) {
   if (g_network_change_notifier) {
     g_network_change_notifier->network_change_observer_list_->AddObserver(
         observer);
   }
 }
 
+void NetworkChangeNotifier::AddMaxBandwidthObserver(
+    MaxBandwidthObserver* observer) {
+  if (g_network_change_notifier) {
+    g_network_change_notifier->max_bandwidth_observer_list_->AddObserver(
+        observer);
+  }
+}
+
 void NetworkChangeNotifier::RemoveIPAddressObserver(
     IPAddressObserver* observer) {
   if (g_network_change_notifier) {
     g_network_change_notifier->ip_address_observer_list_->RemoveObserver(
         observer);
   }
 }
 
 void NetworkChangeNotifier::RemoveConnectionTypeObserver(
     ConnectionTypeObserver* observer) {
@@ skipping 11 matching lines @@
 }
 
 void NetworkChangeNotifier::RemoveNetworkChangeObserver(
     NetworkChangeObserver* observer) {
   if (g_network_change_notifier) {
     g_network_change_notifier->network_change_observer_list_->RemoveObserver(
         observer);
   }
 }
 
+void NetworkChangeNotifier::RemoveMaxBandwidthObserver(
+    MaxBandwidthObserver* observer) {
+  if (g_network_change_notifier) {
+    g_network_change_notifier->max_bandwidth_observer_list_->RemoveObserver(
+        observer);
+  }
+}
+
 // static
 void NetworkChangeNotifier::NotifyObserversOfIPAddressChangeForTests() {
   if (g_network_change_notifier)
     g_network_change_notifier->NotifyObserversOfIPAddressChangeImpl();
 }
 
 // static
 void NetworkChangeNotifier::NotifyObserversOfConnectionTypeChangeForTests(
     ConnectionType type) {
   if (g_network_change_notifier)
     g_network_change_notifier->NotifyObserversOfConnectionTypeChangeImpl(type);
 }
 
 // static
 void NetworkChangeNotifier::NotifyObserversOfNetworkChangeForTests(
     ConnectionType type) {
   if (g_network_change_notifier)
     g_network_change_notifier->NotifyObserversOfNetworkChangeImpl(type);
 }
 
 // static
 void NetworkChangeNotifier::SetTestNotificationsOnly(bool test_only) {
   if (g_network_change_notifier)
     g_network_change_notifier->test_notifications_only_ = test_only;
 }
 
 NetworkChangeNotifier::NetworkChangeNotifier(
     const NetworkChangeCalculatorParams& params
-        /*= NetworkChangeCalculatorParams()*/)
-    : ip_address_observer_list_(
-        new ObserverListThreadSafe<IPAddressObserver>(
-            ObserverListBase<IPAddressObserver>::NOTIFY_EXISTING_ONLY)),
+    /*= NetworkChangeCalculatorParams()*/)
+    : ip_address_observer_list_(new ObserverListThreadSafe<IPAddressObserver>(
+          ObserverListBase<IPAddressObserver>::NOTIFY_EXISTING_ONLY)),
       connection_type_observer_list_(
-        new ObserverListThreadSafe<ConnectionTypeObserver>(
-            ObserverListBase<ConnectionTypeObserver>::NOTIFY_EXISTING_ONLY)),
-      resolver_state_observer_list_(
-        new ObserverListThreadSafe<DNSObserver>(
-            ObserverListBase<DNSObserver>::NOTIFY_EXISTING_ONLY)),
+          new ObserverListThreadSafe<ConnectionTypeObserver>(
+              ObserverListBase<ConnectionTypeObserver>::NOTIFY_EXISTING_ONLY)),
+      resolver_state_observer_list_(new ObserverListThreadSafe<DNSObserver>(
+          ObserverListBase<DNSObserver>::NOTIFY_EXISTING_ONLY)),
       network_change_observer_list_(
-        new ObserverListThreadSafe<NetworkChangeObserver>(
-            ObserverListBase<NetworkChangeObserver>::NOTIFY_EXISTING_ONLY)),
+          new ObserverListThreadSafe<NetworkChangeObserver>(
+              ObserverListBase<NetworkChangeObserver>::NOTIFY_EXISTING_ONLY)),
+      max_bandwidth_observer_list_(
+          new ObserverListThreadSafe<MaxBandwidthObserver>(
+              ObserverListBase<MaxBandwidthObserver>::NOTIFY_EXISTING_ONLY)),
       network_state_(new NetworkState()),
       network_change_calculator_(new NetworkChangeCalculator(params)),
       test_notifications_only_(false) {
   DCHECK(!g_network_change_notifier);
   g_network_change_notifier = this;
   network_change_calculator_->Init();
 }
 
 #if defined(OS_LINUX)
 const internal::AddressTrackerLinux*
@@ skipping 106 matching lines @@
 // static
 void NetworkChangeNotifier::NotifyObserversOfNetworkChange(
     ConnectionType type) {
   if (g_network_change_notifier &&
       !g_network_change_notifier->test_notifications_only_) {
     g_network_change_notifier->NotifyObserversOfNetworkChangeImpl(type);
   }
 }
 
 // static
+void NetworkChangeNotifier::NotifyObserversOfMaxBandwidthChange(
+    double max_bandwidth_mbps) {
+  if (g_network_change_notifier &&
+      !g_network_change_notifier->test_notifications_only_) {
+    g_network_change_notifier->NotifyObserversOfMaxBandwidthChangeImpl(
+        max_bandwidth_mbps);
+  }
+}
+
+// static
 void NetworkChangeNotifier::NotifyObserversOfDNSChange() {
   if (g_network_change_notifier &&
       !g_network_change_notifier->test_notifications_only_) {
     g_network_change_notifier->NotifyObserversOfDNSChangeImpl();
   }
 }
 
 // static
 void NetworkChangeNotifier::SetDnsConfig(const DnsConfig& config) {
   if (!g_network_change_notifier)
@@ skipping 15 matching lines @@
 void NetworkChangeNotifier::NotifyObserversOfNetworkChangeImpl(
     ConnectionType type) {
   network_change_observer_list_->Notify(
       &NetworkChangeObserver::OnNetworkChanged, type);
 }
 
 void NetworkChangeNotifier::NotifyObserversOfDNSChangeImpl() {
   resolver_state_observer_list_->Notify(&DNSObserver::OnDNSChanged);
 }
 
+void NetworkChangeNotifier::NotifyObserversOfMaxBandwidthChangeImpl(
+    double max_bandwidth_mbps) {
+  max_bandwidth_observer_list_->Notify(
+      &MaxBandwidthObserver::OnMaxBandwidthChanged, max_bandwidth_mbps);
+}
+
 NetworkChangeNotifier::DisableForTest::DisableForTest()
     : network_change_notifier_(g_network_change_notifier) {
   DCHECK(g_network_change_notifier);
   g_network_change_notifier = NULL;
 }
 
 NetworkChangeNotifier::DisableForTest::~DisableForTest() {
   DCHECK(!g_network_change_notifier);
   g_network_change_notifier = network_change_notifier_;
 }
 
 }  // namespace net