Fix crash in OmniboxEditModel::OpenMatch()

chrome/browser/ui/omnibox/omnibox_edit_model.cc

 // Copyright 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 "chrome/browser/ui/omnibox/omnibox_edit_model.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/format_macros.h"
@@ skipping 619 matching lines @@
         << "default match changed.";
     if (index != OmniboxPopupModel::kNoMatch)
       log.selected_index = index;
     if (match.inline_autocomplete_offset != string16::npos) {
       DCHECK_GE(match.fill_into_edit.length(),
                 match.inline_autocomplete_offset);
       log.completed_length =
           match.fill_into_edit.length() - match.inline_autocomplete_offset;
     }
 
-    if (disposition == CURRENT_TAB) {
+    if ((disposition == CURRENT_TAB) && delegate_->CurrentPageExists()) {
       // If we know the destination is being opened in the current tab,
       // we can easily get the tab ID.  (If it's being opened in a new
       // tab, we don't know the tab ID yet.)
       log.tab_id = delegate_->GetSessionID().id();
     }
     autocomplete_controller_->AddProvidersInfo(&log.providers_info);
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_OMNIBOX_OPENED_URL,
         content::Source<Profile>(profile_),
         content::Details<AutocompleteLog>(&log));
@@ skipping 719 matching lines @@
     instant->OmniboxFocusChanged(state, reason, NULL);
 
   // Update state and notify view if the omnibox has focus and the caret
   // visibility changed.
   const bool was_caret_visible = is_caret_visible();
   focus_state_ = state;
   if (focus_state_ != OMNIBOX_FOCUS_NONE &&
       is_caret_visible() != was_caret_visible)
     view_->ApplyCaretVisibility();
 }