Add Postscript Printing

chrome/utility/printing_handler.h

 // Copyright 2014 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_UTILITY_PRINTING_HANDLER_H_
 #define CHROME_UTILITY_PRINTING_HANDLER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "build/build_config.h"
@@ skipping 17 matching lines @@
   PrintingHandler();
   ~PrintingHandler() override;
 
   // IPC::Listener:
   bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
   // IPC message handlers.
 #if defined(OS_WIN)
   void OnRenderPDFPagesToMetafile(IPC::PlatformFileForTransit pdf_transit,
-                                  const PdfRenderSettings& settings,
-                                  bool print_text_with_gdi);
+                                  const PdfRenderSettings& settings);
   void OnRenderPDFPagesToMetafileGetPage(
       int page_number,
       IPC::PlatformFileForTransit output_file);
   void OnRenderPDFPagesToMetafileStop();
-#endif  // OS_WIN
+  void OnRenderPDFPagesToPostScriptStart(
+      IPC::PlatformFileForTransit pdf_transit,
+      const PdfRenderSettings& settings);
+  void OnRenderPDFPagesToPostScriptGetPage(
+      int page_number,
+      IPC::PlatformFileForTransit output_file);
+  void OnRenderPDFPagesToPostScriptStop();
+#endif
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   void OnRenderPDFPagesToPWGRaster(IPC::PlatformFileForTransit pdf_transit,
                                    const PdfRenderSettings& settings,
                                    const PwgRasterSettings& bitmap_settings,
                                    IPC::PlatformFileForTransit bitmap_transit);
-#endif  // ENABLE_PRINT_PREVIEW

[dsinclair, 2017/01/17 17:10:00]

Why remove the comments?

+#endif
 
 #if defined(OS_WIN)
   int LoadPDF(base::File pdf_file);
   bool RenderPdfPageToMetafile(int page_number,
                                base::File output_file,
                                float* scale_factor);
-#endif  // OS_WIN
+  bool RenderPdfPageToPostScript(int page_number, base::File output_file);
+#endif
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   bool RenderPDFPagesToPWGRaster(base::File pdf_file,
                                  const PdfRenderSettings& settings,
                                  const PwgRasterSettings& bitmap_settings,
                                  base::File bitmap_file);
 
   void OnGetPrinterCapsAndDefaults(const std::string& printer_name);
   void OnGetPrinterSemanticCapsAndDefaults(const std::string& printer_name);
-#endif  // ENABLE_PRINT_PREVIEW
+#endif
 
 #if defined(OS_WIN)
   std::vector<char> pdf_data_;
   PdfRenderSettings pdf_rendering_settings_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(PrintingHandler);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_UTILITY_PRINTING_HANDLER_H_