base: Stop passing a non-const ref to ObserverListBase::Iterator.

content/browser/service_worker/embedded_worker_instance.cc

 // Copyright 2013 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 "content/browser/service_worker/embedded_worker_instance.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind_helpers.h"
@@ skipping 371 matching lines @@
 
 void EmbeddedWorkerInstance::OnPausedAfterDownload() {
   // Stop can be requested before getting this far.
   if (status_ == STOPPING)
     return;
   DCHECK(status_ == STARTING);
   FOR_EACH_OBSERVER(Listener, listener_list_, OnPausedAfterDownload());
 }
 
 bool EmbeddedWorkerInstance::OnMessageReceived(const IPC::Message& message) {
-  ListenerList::Iterator it(listener_list_);
+  ListenerList::Iterator it(&listener_list_);
   while (Listener* listener = it.GetNext()) {
     if (listener->OnMessageReceived(message))
       return true;
   }
   return false;
 }
 
 void EmbeddedWorkerInstance::OnReportException(
     const base::string16& error_message,
     int line_number,
@@ skipping 76 matching lines @@
     case SCRIPT_EVALUATED:
       return "Script evaluated";
     case STARTING_PHASE_MAX_VALUE:
       NOTREACHED();
   }
   NOTREACHED() << phase;
   return std::string();
 }
 
 }  // namespace content