[NetInfo] Add MaxBandwidthChanged notification and implement on Android

net/base/network_change_notifier.cc

Index: net/base/network_change_notifier.cc
diff --git a/net/base/network_change_notifier.cc b/net/base/network_change_notifier.cc
index b797864ac80f4a74833247f97ebf97ce0a3cc89a..b7a2b7873fb0922239a8f72c55bc1cf79738da82 100644
--- a/net/base/network_change_notifier.cc
+++ b/net/base/network_change_notifier.cc
@@ -688,6 +688,14 @@ void NetworkChangeNotifier::AddNetworkChangeObserver(
   }
 }
 
+void NetworkChangeNotifier::AddMaxBandwidthChangeObserver(
+    MaxBandwidthChangeObserver* observer) {
+  if (g_network_change_notifier) {
+    g_network_change_notifier->max_bandwidth_change_observer_list_->AddObserver(
+        observer);
+  }
+}
+
 void NetworkChangeNotifier::RemoveIPAddressObserver(
     IPAddressObserver* observer) {
   if (g_network_change_notifier) {
@@ -719,6 +727,14 @@ void NetworkChangeNotifier::RemoveNetworkChangeObserver(
   }
 }
 
+void NetworkChangeNotifier::RemoveMaxBandwidthChangeObserver(
+    MaxBandwidthChangeObserver* observer) {
+  if (g_network_change_notifier) {
+    g_network_change_notifier->max_bandwidth_change_observer_list_
+        ->RemoveObserver(observer);
+  }
+}
+
 // static
 void NetworkChangeNotifier::NotifyObserversOfIPAddressChangeForTests() {
   if (g_network_change_notifier)
@@ -747,19 +763,20 @@ void NetworkChangeNotifier::SetTestNotificationsOnly(bool 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_change_observer_list_(new ObserverListThreadSafe<
+          MaxBandwidthChangeObserver>(
+          ObserverListBase<MaxBandwidthChangeObserver>::NOTIFY_EXISTING_ONLY)),
       network_state_(new NetworkState()),
       network_change_calculator_(new NetworkChangeCalculator(params)),
       test_notifications_only_(false) {
@@ -886,6 +903,16 @@ void NetworkChangeNotifier::NotifyObserversOfNetworkChange(
 }
 
 // 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_) {
@@ -921,6 +948,12 @@ void NetworkChangeNotifier::NotifyObserversOfDNSChangeImpl() {
   resolver_state_observer_list_->Notify(&DNSObserver::OnDNSChanged);
 }
 
+void NetworkChangeNotifier::NotifyObserversOfMaxBandwidthChangeImpl(
+    double max_bandwidth_mbps) {
+  max_bandwidth_change_observer_list_->Notify(
+      &MaxBandwidthChangeObserver::OnMaxBandwidthChanged, max_bandwidth_mbps);
+}
+
 NetworkChangeNotifier::DisableForTest::DisableForTest()
     : network_change_notifier_(g_network_change_notifier) {
   DCHECK(g_network_change_notifier);