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

content/renderer/render_frame_impl.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/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 941 matching lines @@
 
 bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
   // TODO(kenrb): document() should not be null, but as a transitional step
   // we have RenderFrameProxy 'wrapping' a RenderFrameImpl, passing messages
   // to this method. This happens for a top-level remote frame, where a
   // document-less RenderFrame is replaced by a RenderFrameProxy but kept
   // around and is still able to receive messages.
   if (!frame_->document().isNull())
     GetContentClient()->SetActiveURL(frame_->document().url());
 
-  ObserverListBase<RenderFrameObserver>::Iterator it(observers_);
+  ObserverListBase<RenderFrameObserver>::Iterator it(&observers_);
   RenderFrameObserver* observer;
   while ((observer = it.GetNext()) != NULL) {
     if (observer->OnMessageReceived(msg))
       return true;
   }
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderFrameImpl, msg)
     IPC_MESSAGE_HANDLER(FrameMsg_Navigate, OnNavigate)
     IPC_MESSAGE_HANDLER(FrameMsg_BeforeUnload, OnBeforeUnload)
@@ skipping 3526 matching lines @@
 
 #if defined(ENABLE_BROWSER_CDMS)
 RendererCdmManager* RenderFrameImpl::GetCdmManager() {
   if (!cdm_manager_)
     cdm_manager_ = new RendererCdmManager(this);
   return cdm_manager_;
 }
 #endif  // defined(ENABLE_BROWSER_CDMS)
 
 }  // namespace content