Replace FOR_EACH_OBSERVER in chromeos/ with range-based for

chromeos/network/network_connection_handler.cc

Index: chromeos/network/network_connection_handler.cc
diff --git a/chromeos/network/network_connection_handler.cc b/chromeos/network/network_connection_handler.cc
index c4f5856d72a4bea216be5ed595374d33fca54cb4..b79c360c8cabb4b813ba40c7edf3401f532871ea 100644
--- a/chromeos/network/network_connection_handler.cc
+++ b/chromeos/network/network_connection_handler.cc
@@ -226,8 +226,8 @@ void NetworkConnectionHandler::ConnectToNetwork(
     const network_handler::ErrorCallback& error_callback,
     bool check_error_state) {
   NET_LOG_USER("ConnectToNetwork", service_path);
-  FOR_EACH_OBSERVER(NetworkConnectionObserver, observers_,
-                    ConnectToNetworkRequested(service_path));
+  for (auto& observer : observers_)
+    observer.ConnectToNetworkRequested(service_path);
 
   // Clear any existing queued connect request.
   queued_connect_.reset();
@@ -313,8 +313,8 @@ void NetworkConnectionHandler::DisconnectNetwork(
     const base::Closure& success_callback,
     const network_handler::ErrorCallback& error_callback) {
   NET_LOG_USER("DisconnectNetwork", service_path);
-  FOR_EACH_OBSERVER(NetworkConnectionObserver, observers_,
-                    DisconnectRequested(service_path));
+  for (auto& observer : observers_)
+    observer.DisconnectRequested(service_path);
 
   const NetworkState* network =
       network_state_handler_->GetNetworkState(service_path);
@@ -762,8 +762,8 @@ void NetworkConnectionHandler::InvokeConnectSuccessCallback(
   NET_LOG_EVENT("Connect Request Succeeded", service_path);
   if (!success_callback.is_null())
     success_callback.Run();
-  FOR_EACH_OBSERVER(NetworkConnectionObserver, observers_,
-                    ConnectSucceeded(service_path));
+  for (auto& observer : observers_)
+    observer.ConnectSucceeded(service_path);
 }
 
 void NetworkConnectionHandler::ErrorCallbackForPendingRequest(
@@ -788,8 +788,8 @@ void NetworkConnectionHandler::InvokeConnectErrorCallback(
   NET_LOG_ERROR("Connect Failure: " + error_name, service_path);
   network_handler::RunErrorCallback(error_callback, service_path, error_name,
                                     "");
-  FOR_EACH_OBSERVER(NetworkConnectionObserver, observers_,
-                    ConnectFailed(service_path, error_name));
+  for (auto& observer : observers_)
+    observer.ConnectFailed(service_path, error_name);
 }
 
 // Disconnect