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

chrome/browser/printing/print_view_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_
 #define CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "content/browser/tab_contents/tab_contents_observer.h"
 #include "content/common/notification_observer.h"
 #include "content/common/notification_registrar.h"
 #include "printing/printed_pages_source.h"
 
 class RenderViewHost;
-class TabContents;
+class TabContentsWrapper;
 struct PrintHostMsg_DidPrintPage_Params;
 
 namespace printing {
 
 class JobEventDetails;
 class PrintJob;
 class PrintJobWorkerOwner;
 
 // Manages the print commands in relation to a TabContents. TabContents
 // delegates a few printing related commands to this instance.
 class PrintViewManager : public NotificationObserver,
                          public PrintedPagesSource,
                          public TabContentsObserver {
  public:
-  explicit PrintViewManager(TabContents* tab_contents);
+  explicit PrintViewManager(TabContentsWrapper* tab);
   virtual ~PrintViewManager();
 
   // Override the title for this PrintViewManager's PrintJobs using the title
   // in |tab_contents|.
   void OverrideTitle(TabContents* tab_contents);
 
   // Prints the current document immediately. Since the rendering is
   // asynchronous, the actual printing will not be completed on the return of
   // this function. Returns false if printing is impossible at the moment.
   bool PrintNow();
@@ skipping 69 matching lines @@
   // while the blocking inner message loop is running. This is useful in cases
   // where the RenderView is about to be destroyed while a printing job isn't
   // finished.
   bool RunInnerMessageLoop();
 
   // In the case of Scripted Printing, where the renderer is controlling the
   // control flow, print_job_ is initialized whenever possible. No-op is
   // print_job_ is initialized.
   bool OpportunisticallyCreatePrintJob(int cookie);
 
+  // TabContentsWrapper we're associated with.
+  TabContentsWrapper* tab_;
+
   NotificationRegistrar registrar_;
 
   // Manages the low-level talk to the printer.
   scoped_refptr<PrintJob> print_job_;
 
   // Number of pages to print in the print job.
   int number_pages_;
 
   // Indication of success of the print job.
   bool printing_succeeded_;
@@ skipping 11 matching lines @@
   // Title override.
   bool is_title_overridden_;
   string16 overridden_title_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintViewManager);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_