Remove incorrect DCHECK in WebContentsImpl::UpdateTitle.

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 4603 matching lines @@
   NavigationEntryImpl* entry = controller_.GetEntryWithPageID(
       render_frame_host->GetSiteInstance(), page_id);
 
   NavigationEntryImpl* new_entry = controller_.GetEntryWithUniqueID(
       static_cast<RenderFrameHostImpl*>(render_frame_host)->nav_entry_id());
   if (SiteIsolationPolicy::AreCrossProcessFramesPossible()) {
     // In out-of-process iframe enabled modes, page_id can't keep track of
     // navigations in other processes, so we must use nav_entry_id.
     // TODO(creis): Switch to use this as the default.
     entry = new_entry;
-  } else {
-    // In modes that have no out-of-process iframes, nav_entry_id and page_id
-    // should agree on which entry to update.
-    DCHECK_EQ(entry, new_entry);
   }
+  // (In modes that have no out-of-process iframes, nav_entry_id and page_id
+  // will usually agree on which entry to update, but may disagree if commits
+  // from a previous RFH have been ignored, resetting the RFH's nav_entry_id.)
 
   // We can handle title updates when we don't have an entry in
   // UpdateTitleForEntry, but only if the update is from the current RVH.
   // TODO(avi): Change to make decisions based on the RenderFrameHost.
   if (!entry && render_frame_host != GetMainFrame())
     return;
 
   // TODO(evan): make use of title_direction.
   // http://code.google.com/p/chromium/issues/detail?id=27094
   UpdateTitleForEntry(entry, title);
@@ skipping 628 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