Remove usage of base::ObserverList<T>::Iter::GetNext() in //content.

content/renderer/render_thread_impl.cc

 // Copyright (c) 2012 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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 1704 matching lines @@
   // In single-process mode, the renderer can't be restarted after shutdown.
   // So, if we get a channel error, crash the whole process right now to get a
   // more informative stack, since we will otherwise just crash later when we
   // try to restart it.
   CHECK(!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kSingleProcess));
   ChildThreadImpl::OnChannelError();
 }
 
 bool RenderThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
-  base::ObserverListBase<RenderThreadObserver>::Iterator it(&observers_);
-  RenderThreadObserver* observer;
-  while ((observer = it.GetNext()) != nullptr) {
-    if (observer->OnControlMessageReceived(msg))
+  for (auto& observer : observers_) {
+    if (observer.OnControlMessageReceived(msg))
       return true;
   }
 
   // Some messages are handled by delegates.
   if (appcache_dispatcher_->OnMessageReceived(msg) ||
       dom_storage_dispatcher_->OnMessageReceived(msg) ||
       embedded_worker_dispatcher_->OnMessageReceived(msg)) {
     return true;
   }
 
@@ skipping 623 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content