Ensure URL is updated after a cross-site navigation is pre-empted

content/browser/tab_contents/navigation_controller.cc

 // Copyright (c) 2011 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/tab_contents/navigation_controller.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/time.h"
@@ skipping 515 matching lines @@
       RendererDidNavigateInPage(params, &(details->did_replace_entry));
       break;
     case NavigationType::NEW_SUBFRAME:
       RendererDidNavigateNewSubframe(params);
       break;
     case NavigationType::AUTO_SUBFRAME:
       if (!RendererDidNavigateAutoSubframe(params))
         return false;
       break;
     case NavigationType::NAV_IGNORE:
-      // There is nothing we can do with this navigation, so we just return to
+      // If a pending navigation was in progress, this canceled it.  We should
+      // discard it and make sure it is removed from the URL bar.  After that,
+      // there is nothing we can do with this navigation, so we just return to
       // the caller that nothing has happened.
+      if (pending_entry_) {
+        DiscardNonCommittedEntries();
+        extra_invalidate_flags |= TabContents::INVALIDATE_URL;
+        tab_contents_->NotifyNavigationStateChanged(extra_invalidate_flags);
+      }
       return false;
     default:
       NOTREACHED();
   }
 
   // All committed entries should have nonempty content state so WebKit doesn't
   // get confused when we go back to them (see the function for details).
   DCHECK(!params.content_state.empty());
   NavigationEntry* active_entry = GetActiveEntry();
   active_entry->set_content_state(params.content_state);
@@ skipping 662 matching lines @@
   size_t insert_index = 0;
   for (int i = 0; i < max_index; i++) {
     // When cloning a tab, copy all entries except interstitial pages
     if (source.entries_[i].get()->page_type() != INTERSTITIAL_PAGE) {
       entries_.insert(entries_.begin() + insert_index++,
                       linked_ptr<NavigationEntry>(
                           new NavigationEntry(*source.entries_[i])));
     }
   }
 }