Make Print API work on Windows.

chromium_src/chrome/browser/printing/print_job.h

@@ -90,6 +90,19 @@ class PrintJob : public PrintJobWorkerOwner,
   // Access the current printed document. Warning: may be NULL.
   PrintedDocument* document() const;
 
+#if defined(OS_WIN)
+  void StartPdfToEmfConversion(
+      const scoped_refptr<base::RefCountedMemory>& bytes,
+      const gfx::Size& page_size,
+      const gfx::Rect& content_area);
+
+  void OnPdfToEmfStarted(int page_count);
+  void OnPdfToEmfPageConverted(int page_number,
+                               float scale_factor,
+                               scoped_ptr<MetafilePlayer> emf);
+
+#endif  // OS_WIN
+
  protected:
   virtual ~PrintJob();
 
@@ -137,6 +150,11 @@ class PrintJob : public PrintJobWorkerOwner,
   // the notified calls Cancel() again.
   bool is_canceling_;
 
+#if defined(OS_WIN)
+  class PdfToEmfState;
+  scoped_ptr<PdfToEmfState> ptd_to_emf_state_;
+#endif  // OS_WIN
+
   // Used at shutdown so that we can quit a nested message loop.
   base::WeakPtrFactory<PrintJob> quit_factory_;