Attempt at fixing crash. It looks like the printing code can delete

chrome/browser/printing/print_view_manager.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 "chrome/browser/printing/print_view_manager.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/printing/print_job.h"
 #include "chrome/browser/printing/print_job_manager.h"
 #include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/printing/printer_query.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/webui/print_preview_ui.h"
 #include "chrome/common/print_messages.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/navigation_entry.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/notification_details.h"
 #include "content/common/notification_service.h"
 #include "content/common/notification_source.h"
 #include "grit/generated_resources.h"
 #include "printing/metafile.h"
 #include "printing/metafile_impl.h"
 #include "printing/printed_document.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using base::TimeDelta;
 
 namespace {
 
 string16 GenerateRenderSourceName(TabContents* tab_contents) {
   string16 name(tab_contents->GetTitle());
   if (name.empty())
     name = l10n_util::GetStringUTF16(IDS_DEFAULT_PRINT_DOCUMENT_TITLE);
   return name;
 }
 
 }  // namespace
 
 namespace printing {
 
-PrintViewManager::PrintViewManager(TabContents* tab_contents)
-    : TabContentsObserver(tab_contents),
+PrintViewManager::PrintViewManager(TabContentsWrapper* tab)
+    : TabContentsObserver(tab->tab_contents()),
+      tab_(tab),
       number_pages_(0),
       printing_succeeded_(false),
       inside_inner_message_loop_(false),
       is_title_overridden_(false) {
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   expecting_first_page_ = true;
 #endif
 }
 
 PrintViewManager::~PrintViewManager() {
@@ skipping 164 matching lines @@
 }
 
 void PrintViewManager::OnNotifyPrintJobEvent(
     const JobEventDetails& event_details) {
   switch (event_details.type()) {
     case JobEventDetails::FAILED: {
       TerminatePrintJob(true);
 
       NotificationService::current()->Notify(
           NotificationType::PRINT_JOB_RELEASED,
-          Source<TabContents>(tab_contents()),
+          Source<TabContentsWrapper>(tab_),
           NotificationService::NoDetails());
       break;
     }
     case JobEventDetails::USER_INIT_DONE:
     case JobEventDetails::DEFAULT_INIT_DONE:
     case JobEventDetails::USER_INIT_CANCELED: {
       NOTREACHED();
       break;
     }
     case JobEventDetails::ALL_PAGES_REQUESTED: {
       ShouldQuitFromInnerMessageLoop();
       break;
     }
     case JobEventDetails::NEW_DOC:
     case JobEventDetails::NEW_PAGE:
     case JobEventDetails::PAGE_DONE:
     case JobEventDetails::DOC_DONE: {
       // Don't care about the actual printing process.
       break;
     }
     case JobEventDetails::JOB_DONE: {
       // Printing is done, we don't need it anymore.
       // print_job_->is_job_pending() may still be true, depending on the order
       // of object registration.
       printing_succeeded_ = true;
       ReleasePrintJob();
 
       NotificationService::current()->Notify(
           NotificationType::PRINT_JOB_RELEASED,
-          Source<TabContents>(tab_contents()),
+          Source<TabContentsWrapper>(tab_),
           NotificationService::NoDetails());
       break;
     }
     default: {
       NOTREACHED();
       break;
     }
   }
 }
 
@@ skipping 194 matching lines @@
     return false;
   }
 
   // Settings are already loaded. Go ahead. This will set
   // print_job_->is_job_pending() to true.
   print_job_->StartPrinting();
   return true;
 }
 
 }  // namespace printing