Remove usage of FOR_EACH_OBSERVER macro in blimp

blimp/net/blimp_connection.cc

 // Copyright 2015 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 "blimp/net/blimp_connection.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
@@ skipping 174 matching lines @@
 }
 
 BlimpMessageProcessor* BlimpConnection::GetOutgoingMessageProcessor() {
   return outgoing_msg_processor_.get();
 }
 
 void BlimpConnection::OnConnectionError(int error) {
   VLOG(1) << "OnConnectionError, error=" << error;
 
   // Propagate the error to all observers.
-  FOR_EACH_OBSERVER(ConnectionErrorObserver, error_observers_,
-                    OnConnectionError(error));
+  for (auto& observer : error_observers_)
+    observer.OnConnectionError(error);
 }
 
 }  // namespace blimp