Connect the right metafiles for print preview on Linux and Windows.

printing/pdf_metafile_cairo_linux.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_PDF_METAFILE_CAIRO_LINUX_H_
 #define PRINTING_PDF_METAFILE_CAIRO_LINUX_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
-#include "printing/native_metafile.h"
+#include "printing/metafile.h"
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }
 
 typedef struct _cairo_surface cairo_surface_t;
 
 namespace printing {
 
 // This class uses Cairo graphics library to generate PDF stream and stores
 // rendering results in a string buffer.
-class PdfMetafileCairo : public NativeMetafile {
+class PdfMetafileCairo : public Metafile {
  public:
+  PdfMetafileCairo();
   virtual ~PdfMetafileCairo();
 
-  // NativeMetafile methods.
+  // Metafile methods.
   virtual bool Init();
 
   //  Calling InitFromData() sets the data for this metafile and masks data
   //  induced by previous calls to Init() or InitFromData(), even if drawing
   //  continues on the surface returned by a previous call to Init().
   virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size);
 
   virtual skia::PlatformDevice* StartPageForVectorCanvas(
       const gfx::Size& page_size, const gfx::Point& content_origin,
       const float& scale_factor);
@@ skipping 10 matching lines @@
 
   virtual gfx::Rect GetPageBounds(unsigned int page_number) const;
   virtual unsigned int GetPageCount() const;
 
   virtual cairo_t* context() const;
 
 #if defined(OS_CHROMEOS)
   virtual bool SaveToFD(const base::FileDescriptor& fd) const;
 #endif  // if defined(OS_CHROMEOS)
 
- protected:
-  PdfMetafileCairo();
-
  private:
-  friend class NativeMetafileFactory;
-  FRIEND_TEST_ALL_PREFIXES(PdfMetafileCairoTest, Pdf);
-
   // Cleans up all resources.
   void CleanUpAll();
 
   // Cairo surface and context for entire PDF file.
   cairo_surface_t* surface_;
   cairo_t* context_;
 
   // Buffer stores PDF contents for entire PDF file.
   std::string cairo_data_;
   // Buffer stores PDF contents. It can only be populated from InitFromData().
   // Any calls to StartPage(), FinishPage(), FinishDocument() do not affect
   // this buffer.
   // Note: Such calls will result in DCHECK errors if Init() has not been called
   // first.
   std::string raw_data_;
   // Points to the appropriate buffer depending on the way the object was
   // initialized (Init() vs InitFromData()).
   std::string* current_data_;
 
   DISALLOW_COPY_AND_ASSIGN(PdfMetafileCairo);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_METAFILE_CAIRO_LINUX_H_