Refactor win printing workflow to support print preview.

chrome/renderer/print_web_view_helper.cc

 // 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.
 
 #include "chrome/renderer/print_web_view_helper.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/process_util.h"
@@ skipping 492 matching lines @@
   }
 }
 
 void PrintWebViewHelper::RenderPagesForPreview(WebFrame *frame) {
   ViewMsg_PrintPages_Params print_settings = *print_pages_params_;
   ViewHostMsg_DidPreviewDocument_Params print_params;
   CreatePreviewDocument(print_settings, frame, &print_params);
   Send(new ViewHostMsg_PagesReadyForPreview(routing_id(), print_params));
 }
 
-#if !defined(OS_MACOSX)
+#if defined(OS_LINUX)
 void PrintWebViewHelper::CreatePreviewDocument(
     const ViewMsg_PrintPages_Params& params,
     WebFrame* frame,
     ViewHostMsg_DidPreviewDocument_Params* print_params) {
   // TODO(kmadhusu): Implement this function for windows & linux.
   print_params->document_cookie = params.params.document_cookie;
 }
 #endif
 
 #if defined(OS_MACOSX)
@@ skipping 10 matching lines @@
         shared_buf.GiveToProcess(base::GetCurrentProcessHandle(),
                                  shared_mem_handle);
         return true;
       }
     }
   }
   NOTREACHED();
   return false;
 }
 #endif