Cleanup: Convert PrintPreviewTabController to use TabContentsWrapper.

chrome/browser/ui/webui/print_preview_handler.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_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_
 #pragma once
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/printing/print_view_manager_observer.h"
 #include "chrome/browser/ui/shell_dialogs.h"
 #include "content/browser/webui/web_ui.h"
 
 class FilePath;
 class PrintSystemTaskProxy;
+class TabContentsWrapper;
 
 namespace base {
 class FundamentalValue;
 class StringValue;
 }
 
 namespace printing {
 class PrintBackend;
 }
 
@@ skipping 29 matching lines @@
   // Called when print preview failed.
   void OnPrintPreviewFailed();
 
   // Called when the user press ctrl+shift+p to display the native system
   // dialog.
   void ShowSystemDialog();
 
  private:
   friend class PrintSystemTaskProxy;
 
-  TabContents* preview_tab();
+  TabContentsWrapper* preview_tab_wrapper() const;
+  TabContents* preview_tab() const;
 
   // Gets the default printer. |args| is unused.
   void HandleGetDefaultPrinter(const base::ListValue* args);
 
   // Gets the list of printers. |args| is unused.
   void HandleGetPrinters(const base::ListValue* args);
 
   // Asks the initiator renderer to generate a preview.  First element of |args|
   // is a job settings JSON string.
   void HandleGetPreview(const base::ListValue* args);
@@ skipping 52 matching lines @@
   void SetupPrinterList(const base::ListValue& printers);
 
   // Send whether cloud print integration should be enabled.
   void SendCloudPrintEnabled();
 
   // Send the PDF data to the cloud to print.
   void SendCloudPrintJob(const base::DictionaryValue& settings,
                          std::string print_ticket);
 
   // Gets the initiator tab for the print preview tab.
-  TabContents* GetInitiatorTab();
+  TabContentsWrapper* GetInitiatorTab() const;
 
   // Closes the print preview tab.
   void ClosePrintPreviewTab();
 
   // Activates the initiator tab and close the preview tab.
   void ActivateInitiatorTabAndClosePreviewTab();
 
   // Adds all the recorded stats taken so far to histogram counts.
   void ReportStats();
 
@@ skipping 24 matching lines @@
   // Whether we have already logged a failed print preview.
   bool reported_failed_preview_;
 
   // Whether we have already logged the number of printers this session.
   bool has_logged_printers_count_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_