Adds some debugging code to isolate a crash

chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.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 "chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.h"
 
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/themes/theme_properties.h"
 #include "chrome/browser/ui/omnibox/omnibox_view.h"
 #include "chrome/browser/ui/views/location_bar/location_bar_view.h"
@@ skipping 23 matching lines @@
 // This is the number of pixels in the border image interior to the actual
 // border.
 const int kBorderInterior = 6;
 
 }  // namespace
 
 class OmniboxPopupContentsView::AutocompletePopupWidget
     : public views::Widget,
       public base::SupportsWeakPtr<AutocompletePopupWidget> {
  public:
-  AutocompletePopupWidget() {}
-  virtual ~AutocompletePopupWidget() {}
+  AutocompletePopupWidget() : crash_if_destroyed_(false) {}
+  virtual ~AutocompletePopupWidget() {
+    CHECK(!crash_if_destroyed_);
+  }
+
+  void set_crash_if_destroyed(bool value) { crash_if_destroyed_ = value; }
 
  private:
+  // For debugging a crash.
+  // TODO(sky): nuke this when we figure out 275794.
+  bool crash_if_destroyed_;
+
   DISALLOW_COPY_AND_ASSIGN(AutocompletePopupWidget);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // OmniboxPopupContentsView, public:
 
 OmniboxPopupView* OmniboxPopupContentsView::Create(
     const gfx::FontList& font_list,
     OmniboxView* omnibox_view,
     OmniboxEditModel* edit_model,
@@ skipping 150 matching lines @@
         location_bar_view_->GetWidget()->GetNativeView();
 
     // If the popup is currently closed, we need to create it.
     popup_ = (new AutocompletePopupWidget)->AsWeakPtr();
     views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
     params.can_activate = false;
     params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
     params.parent = popup_parent;
     params.bounds = GetPopupBounds();
     params.context = popup_parent;
+    popup_->set_crash_if_destroyed(true);
     popup_->Init(params);
+    popup_->set_crash_if_destroyed(false);
 #if defined(USE_AURA)
     views::corewm::SetWindowVisibilityAnimationType(
         popup_->GetNativeView(),
         views::corewm::WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL);
 #if defined(OS_CHROMEOS)
     // No animation for autocomplete popup appearance.
     views::corewm::SetWindowVisibilityAnimationTransition(
         popup_->GetNativeView(), views::corewm::ANIMATE_HIDE);
 #endif
 #endif
@@ skipping 280 matching lines @@
   // OpenMatch() may close the popup, which will clear the result set and, by
   // extension, |match| and its contents.  So copy the relevant match out to
   // make sure it stays alive until the call completes.
   AutocompleteMatch match = model_->result().match_at(index);
   omnibox_view_->OpenMatch(match, disposition, GURL(), index);
 }
 
 OmniboxResultView* OmniboxPopupContentsView::result_view_at(size_t i) {
   return static_cast<OmniboxResultView*>(child_at(static_cast<int>(i)));
 }