Use file handles to interact with utility process.

chrome/browser/printing/print_job.h

Index: chrome/browser/printing/print_job.h
diff --git a/chrome/browser/printing/print_job.h b/chrome/browser/printing/print_job.h
index fe1c1e4d97166db11ad6898311f417c49af744d7..fa2498bfce39488e9c9bd050b273f87c86542c11 100644
--- a/chrome/browser/printing/print_job.h
+++ b/chrome/browser/printing/print_job.h
@@ -15,15 +15,19 @@
 
 class Thread;
 
+namespace base {
+class RefCountedMemory;
+}
+
 namespace printing {
 
-// See definition below.
 class JobEventDetails;
-
+class MetafilePlayer;
+class PdfToEmfConverter;
+class PrintJobWorker;
 class PrintedDocument;
 class PrintedPage;
 class PrintedPagesSource;
-class PrintJobWorker;
 class PrinterQuery;
 
 // Manages the print work for a specific document. Talks to the printer through
@@ -86,6 +90,13 @@ 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);
+#endif  // OS_WIN
+
  protected:
   virtual ~PrintJob();
 
@@ -109,6 +120,13 @@ class PrintJob : public PrintJobWorkerOwner,
 
   void HoldUntilStopIsCalled();
 
+#if defined(OS_WIN)
+  void OnPdfToEmfStarted(int page_count);
+  void OnPdfToEmfPageConverted(int page_number,
+                               double scale_factor,
+                               scoped_ptr<MetafilePlayer> emf);
+#endif  // OS_WIN
+
   content::NotificationRegistrar registrar_;
 
   // Source that generates the PrintedPage's (i.e. a WebContents). It will be
@@ -133,6 +151,11 @@ 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_;