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

content/browser/web_contents/web_contents_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/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 657 matching lines @@
 
 bool WebContentsImpl::OnMessageReceived(RenderViewHost* render_view_host,
                                         RenderFrameHost* render_frame_host,
                                         const IPC::Message& message) {
   DCHECK(render_view_host || render_frame_host);
   if (GetWebUI() &&
       static_cast<WebUIImpl*>(GetWebUI())->OnMessageReceived(message)) {
     return true;
   }
 
-  base::ObserverListBase<WebContentsObserver>::Iterator it(&observers_);
-  WebContentsObserver* observer;
   if (render_frame_host) {
-    while ((observer = it.GetNext()) != NULL)
-      if (observer->OnMessageReceived(message, render_frame_host))
+    for (auto& observer : observers_) {
+      if (observer.OnMessageReceived(message, render_frame_host))
         return true;
+    }
   } else {
-    while ((observer = it.GetNext()) != NULL)
-      if (observer->OnMessageReceived(message))
+    for (auto& observer : observers_) {
+      if (observer.OnMessageReceived(message))
         return true;
+    }
   }
 
   // Message handlers should be aware of which
   // RenderViewHost/RenderFrameHost sent the message, which is temporarily
   // stored in render_(view|frame)_message_source_.
   if (render_frame_host)
     render_frame_message_source_ = render_frame_host;
   else
     render_view_message_source_ = render_view_host;
 
@@ skipping 4580 matching lines @@
   dialog_manager_ = dialog_manager;
 }
 
 void WebContentsImpl::RemoveBindingSet(const std::string& interface_name) {
   auto it = binding_sets_.find(interface_name);
   if (it != binding_sets_.end())
     binding_sets_.erase(it);
 }
 
 }  // namespace content