[NetInfo] Add MaxBandwidthChanged notification and implement on Android

net/android/network_change_notifier_delegate_android.cc

Index: net/android/network_change_notifier_delegate_android.cc
diff --git a/net/android/network_change_notifier_delegate_android.cc b/net/android/network_change_notifier_delegate_android.cc
index a6a71322586998df43233ff8ffb12faa13ce48b0..1aa1ec596ea80df00f481cdcd3e481bf7cf34c85 100644
--- a/net/android/network_change_notifier_delegate_android.cc
+++ b/net/android/network_change_notifier_delegate_android.cc
@@ -96,8 +96,6 @@ void NetworkChangeNotifierDelegateAndroid::NotifyConnectionTypeChanged(
   const ConnectionType actual_connection_type = ConvertConnectionType(
       new_connection_type);
   SetCurrentConnectionType(actual_connection_type);
-  SetCurrentMaxBandwidth(Java_NetworkChangeNotifier_getCurrentMaxBandwidth(
-      env, java_network_change_notifier_.obj()));
   observers_->Notify(&Observer::OnConnectionTypeChanged);
 }
 
@@ -107,6 +105,16 @@ jint NetworkChangeNotifierDelegateAndroid::GetConnectionType(JNIEnv*,
   return GetCurrentConnectionType();
 }
 
+void NetworkChangeNotifierDelegateAndroid::NotifyMaxBandwidthChanged(
+    JNIEnv* env,
+    jobject obj,
+    jdouble new_max_bandwidth) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(new_max_bandwidth != connection_max_bandwidth_);
+  SetCurrentMaxBandwidth(new_max_bandwidth);
+  observers_->Notify(&Observer::OnMaxBandwidthChanged, new_max_bandwidth);
+}
+
 void NetworkChangeNotifierDelegateAndroid::AddObserver(
     Observer* observer) {
   observers_->AddObserver(observer);