Revert of More System Dialog printing code disabled on Windows.

chrome/browser/printing/print_view_manager.h

 // Copyright (c) 2012 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_
 
 #include "chrome/browser/printing/print_view_manager_base.h"
 #include "content/public/browser/web_contents_user_data.h"
 
 namespace content {
 class RenderProcessHost;
 }
 
 namespace printing {
 
 class PrintViewManagerObserver;
 
 // Manages the print commands for a WebContents.
 class PrintViewManager : public PrintViewManagerBase,
                          public content::WebContentsUserData<PrintViewManager> {
  public:
   virtual ~PrintViewManager();
 
-#if !defined(OS_WIN)
   // Same as PrintNow(), but for the case where a user prints with the system
   // dialog from print preview.
   bool PrintForSystemDialogNow();
 
   // Same as PrintNow(), but for the case where a user press "ctrl+shift+p" to
   // show the native system dialog. This can happen from both initiator and
   // preview dialog.
   bool AdvancedPrintNow();
-#endif  // !OS_WIN
 
   // Initiate print preview of the current document by first notifying the
   // renderer. Since this happens asynchronous, the print preview dialog
   // creation will not be completed on the return of this function. Returns
   // false if print preview is impossible at the moment.
   bool PrintPreviewNow(bool selection_only);
 
   // Notify PrintViewManager that print preview is starting in the renderer for
   // a particular WebNode.
   void PrintPreviewForWebNode();
@@ skipping 39 matching lines @@
 
   // Keeps track of the pending callback during scripted print preview.
   content::RenderProcessHost* scripted_print_preview_rph_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintViewManager);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_