Try and find the location of crash

chrome/browser/views/frame/browser_view2.cc

 // Copyright (c) 2006-2008 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 "base/command_line.h"
 
 #include "chrome/browser/views/frame/browser_view2.h"
 
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/app/theme/theme_resources.h"
@@ skipping 183 matching lines @@
 }
 
 void BrowserView2::AddViewToDropList(ChromeViews::View* view) {
   dropable_views_.insert(view);
 }
 
 bool BrowserView2::ActivateAppModalDialog() const {
   // If another browser is app modal, flash and activate the modal browser.
   if (BrowserList::IsShowingAppModalDialog()) {
     if (browser_ != BrowserList::GetLastActive()) {
+      CHECK(BrowserList::GetLastActive());
+      CHECK(BrowserList::GetLastActive()->window());
       BrowserList::GetLastActive()->window()->FlashFrame();
       BrowserList::GetLastActive()->MoveToFront(true);
     }
     AppModalDialogQueue::ActivateModalDialog();
     return true;
   }
   return false;
 }
 
 void BrowserView2::ActivationChanged(bool activated) {
@@ skipping 980 matching lines @@
 // static
 void BrowserView2::InitClass() {
   static bool initialized = false;
   if (!initialized) {
     ResourceBundle& rb = ResourceBundle::GetSharedInstance();
     default_favicon_ = *rb.GetBitmapNamed(IDR_DEFAULT_FAVICON);
     initialized = true;
   }
 }