Load pdf library on all platforms.

printing/pdf_render_settings.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_RENDER_SETTINGS_H_
 #define PRINTING_PDF_RENDER_SETTINGS_H_
 
 #include "base/tuple.h"
 #include "ipc/ipc_param_traits.h"
 #include "printing/printing_export.h"
 #include "ui/gfx/rect.h"
 
 namespace printing {
 
 // Defining PDF rendering settings here as a Tuple as following:
 // gfx::Rect - render area
 // int - render dpi
 // bool - autorotate pages to fit paper
 typedef Tuple3<gfx::Rect, int, bool> PdfRenderSettingsBase;
 
-struct PdfRenderSettings : public PdfRenderSettingsBase {
+class PdfRenderSettings : public PdfRenderSettingsBase {
  public:
   PdfRenderSettings() : PdfRenderSettingsBase() {}
   PdfRenderSettings(gfx::Rect area, int dpi, bool autorotate)
       : PdfRenderSettingsBase(area, dpi, autorotate) {}
   ~PdfRenderSettings() {}
 
   const gfx::Rect& area() const { return a; }
   int dpi() const { return b; }
   bool autorotate() const { return c; }
 };
 
 }  // namespace printing
 
 namespace IPC {
 template <>
 struct SimilarTypeTraits<printing::PdfRenderSettings> {
   typedef printing::PdfRenderSettingsBase Type;
 };
 
 }  // namespace IPC
 
 #endif  // PRINTING_PDF_RENDER_SETTINGS_H_