PrintPreview:[MAC] Added "Open PDF In Preview" option to open the pdf in native preview app.

printing/printing_context_mac.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 PRINTING_PRINTING_CONTEXT_MAC_H_
 #define PRINTING_PRINTING_CONTEXT_MAC_H_
 
 #include <string>
 
 #include "base/memory/scoped_nsobject.h"
@@ skipping 43 matching lines @@
   PageRanges GetPageRangesFromPrintInfo();
 
   // Updates |print_info_| to use the given printer.
   // Returns true if the printer was set else returns false.
   bool SetPrinter(const std::string& device_name);
 
   // Updates |print_info_| page format with user default paper information.
   // Returns true if the paper was set else returns false.
   bool UpdatePageFormatWithPaperInfo();
 
+  // Sets the print job destination type as preview job.
+  // Returns true if the print job destination type is set.
+  bool SetPrintPreviewJob();
+
   // Sets |copies| in PMPrintSettings.
   // Returns true if the number of copies is set.
   bool SetCopiesInPrintSettings(int copies);
 
   // Sets |collate| in PMPrintSettings.
   // Returns true if |collate| is set.
   bool SetCollateInPrintSettings(bool collate);
 
   // Sets orientation in native print info object.
   // Returns true if the orientation was set.
@@ skipping 13 matching lines @@
   // The current page's context; only valid between NewPage and PageDone call
   // pairs.
   CGContext* context_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintingContextMac);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_MAC_H_