Cleanup: Convert PrintPreviewTabController to use TabContentsWrapper.

chrome/browser/printing/print_preview_message_handler.h

Index: chrome/browser/printing/print_preview_message_handler.h
===================================================================
--- chrome/browser/printing/print_preview_message_handler.h	(revision 98744)
+++ chrome/browser/printing/print_preview_message_handler.h	(working copy)
@@ -8,6 +8,7 @@
 
 #include "content/browser/tab_contents/tab_contents_observer.h"
 
+class TabContentsWrapper;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
 struct PrintHostMsg_DidPreviewDocument_Params;
 struct PrintHostMsg_DidPreviewPage_Params;
@@ -30,7 +31,9 @@
 
  private:
   // Gets the print preview tab associated with the TabContents being observed.
-  TabContents* GetPrintPreviewTab();
+  TabContentsWrapper* GetPrintPreviewTab();
+  // Helper function to return the TabContentsWrapper for tab_contents().

[kmadhusu, 2011/08/30 21:00:01]

nit: Add a blank line before this.

+  TabContentsWrapper* tab_contents_wrapper();
 
   // Message handlers.
   void OnRequestPrintPreview();