Make PluginInstance::PrintPDFOutput-metafile implementation agnostic on Linux.

printing/pdf_ps_metafile_cairo.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_PS_METAFILE_CAIRO_H_
 #define PRINTING_PDF_PS_METAFILE_CAIRO_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 40 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)
 
-  // Returns the PdfPsMetafile object that owns the given context. Returns NULL
-  // if the context was not created by a PdfPsMetafile object.
-  static PdfPsMetafile* FromCairoContext(cairo_t* context);
-
  protected:
   PdfPsMetafile();
 
  private:
   friend class NativeMetafileFactory;
   FRIEND_TEST_ALL_PREFIXES(PdfPsTest, Pdf);
 
   // Cleans up all resources.
   void CleanUpAll();
 
@@ skipping 12 matching lines @@
   // Points to the appropriate buffer depending on the way the object was
   // initialized (Init() vs InitFromData()).
   std::string* current_data_;
 
   DISALLOW_COPY_AND_ASSIGN(PdfPsMetafile);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_PS_METAFILE_CAIRO_H_