Add another sanity check, this time that the popup's "open state" (HWND) matc...

chrome/browser/views/autocomplete/autocomplete_popup_contents_view.cc

 // Copyright (c) 2009 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/views/autocomplete/autocomplete_popup_contents_view.h"
 
 #include "app/gfx/canvas.h"
 #include "app/gfx/color_utils.h"
 #include "app/gfx/insets.h"
 #include "app/gfx/path.h"
@@ skipping 601 matching lines @@
       size_animation_.GetCurrentValue() * total_height_delta - 0.5);
   current_frame_bounds.set_height(
       current_frame_bounds.height() + current_height_delta);
   return current_frame_bounds;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // AutocompletePopupContentsView, AutocompletePopupView overrides:
 
 bool AutocompletePopupContentsView::IsOpen() const {
-  return popup_->IsOpen();
+  const bool is_open = popup_->IsOpen();
+  CHECK(!!GetChildViewCount() == is_open);
+  return is_open;
 }
 
 void AutocompletePopupContentsView::InvalidateLine(size_t line) {
   GetChildViewAt(static_cast<int>(line))->SchedulePaint();
 }
 
 void AutocompletePopupContentsView::UpdatePopupAppearance() {
   if (model_->result().empty()) {
     // No matches, close any existing popup.
     if (popup_->IsCreated()) {
@@ skipping 235 matching lines @@
 // static
 AutocompletePopupView* AutocompletePopupView::CreatePopupView(
     const gfx::Font& font,
     AutocompleteEditView* edit_view,
     AutocompleteEditModel* edit_model,
     Profile* profile,
     const BubblePositioner* bubble_positioner) {
   return new AutocompletePopupContentsView(font, edit_view, edit_model,
                                            profile, bubble_positioner);
 }