Revert of More System Dialog printing code disabled on Windows.

chrome/renderer/printing/print_web_view_helper.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_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 100 matching lines @@
   };
 
   // RenderViewObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void PrintPage(blink::WebLocalFrame* frame,
                          bool user_initiated) OVERRIDE;
   virtual void DidStartLoading() OVERRIDE;
   virtual void DidStopLoading() OVERRIDE;
 
   // Message handlers ---------------------------------------------------------
-#if !defined(OS_WIN)
   void OnPrintPages();
   void OnPrintForSystemDialog();
-#endif  // !OS_WIN
   void OnInitiatePrintPreview(bool selection_only);
   void OnPrintPreview(const base::DictionaryValue& settings);
   void OnPrintForPrintPreview(const base::DictionaryValue& job_settings);
   void OnPrintingDone(bool success);
 
   // Get |page_size| and |content_area| information from
   // |page_layout_in_points|.
   void GetPageSizeAndContentAreaFromPageLayout(
       const PageSizeMargins& page_layout_in_points,
       gfx::Size* page_size,
@@ skipping 303 matching lines @@
   // hangs because RequestPrintPreview is called before DidStopLoading() is
   // called. This is a store for the RequestPrintPreview() call and its
   // parameters so that it can be invoked after DidStopLoading.
   base::Closure on_stop_loading_closure_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_