Remove incorrect DCHECK in WebContentsImpl::UpdateTitle.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 397c14b9dbbf688fadb669dfc336582cdd7a1488..ec95918e642f32757c476122ba78261f6e688bcf 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -4621,11 +4621,10 @@ void WebContentsImpl::UpdateTitle(RenderFrameHost* render_frame_host,
     // 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.