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

content/renderer/render_view_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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
@@ skipping 1286 matching lines @@
 bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
   WebFrame* main_frame = webview() ? webview()->mainFrame() : NULL;
   if (main_frame && main_frame->isWebLocalFrame())
     GetContentClient()->SetActiveURL(main_frame->document().url());
 
   // Input IPC messages must not be processed if the RenderView is in
   // swapped out state.
   if (is_swapped_out_ && IPC_MESSAGE_ID_CLASS(message.type()) == InputMsgStart)
     return false;
 
-  base::ObserverListBase<RenderViewObserver>::Iterator it(&observers_);
-  RenderViewObserver* observer;
-  while ((observer = it.GetNext()) != NULL)
-    if (observer->OnMessageReceived(message))
+  for (auto& observer : observers_) {
+    if (observer.OnMessageReceived(message))
       return true;
+  }
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderViewImpl, message)
     IPC_MESSAGE_HANDLER(InputMsg_ExecuteEditCommand, OnExecuteEditCommand)
     IPC_MESSAGE_HANDLER(InputMsg_MoveCaret, OnMoveCaret)
     IPC_MESSAGE_HANDLER(InputMsg_ScrollFocusedEditableNodeIntoRect,
                         OnScrollFocusedEditableNodeIntoRect)
     IPC_MESSAGE_HANDLER(ViewMsg_SetPageScale, OnSetPageScale)
     IPC_MESSAGE_HANDLER(ViewMsg_Zoom, OnZoom)
     IPC_MESSAGE_HANDLER(ViewMsg_SetZoomLevelForLoadingURL,
@@ skipping 1694 matching lines @@
   if (IsUseZoomForDSFEnabled()) {
     webview()->setZoomFactorForDeviceScaleFactor(device_scale_factor_);
   } else {
     webview()->setDeviceScaleFactor(device_scale_factor_);
   }
   webview()->settings()->setPreferCompositingToLCDTextEnabled(
       PreferCompositingToLCDText(compositor_deps_, device_scale_factor_));
 }
 
 }  // namespace content