Move Start/EndPage() from NewPage/PageDone() to inside the metafile.

printing/printing_context_win.cc

Index: printing/printing_context_win.cc
diff --git a/printing/printing_context_win.cc b/printing/printing_context_win.cc
index 467bf3c7ad52b3c00d4349d98839e82cca5ac298..32a44be1d14fad9c7fae77323d8c234ca37e4932 100644
--- a/printing/printing_context_win.cc
+++ b/printing/printing_context_win.cc
@@ -298,13 +298,11 @@ PrintingContext::Result PrintingContextWin::NewDocument(
 PrintingContext::Result PrintingContextWin::NewPage() {
   if (abort_printing_)
     return CANCEL;
-
   DCHECK(context_);
   DCHECK(in_print_job_);
 
-  // Inform the driver that the application is about to begin sending data.
-  if (StartPage(context_) <= 0)
-    return OnError();
+  // Intentional No-op. NativeMetafile::SafePlayback takes care of calling
+  // ::StartPage().
 
   return OK;
 }
@@ -314,8 +312,9 @@ PrintingContext::Result PrintingContextWin::PageDone() {
     return CANCEL;
   DCHECK(in_print_job_);
 
-  if (EndPage(context_) <= 0)
-    return OnError();
+  // Intentional No-op. NativeMetafile::SafePlayback takes care of calling
+  // ::EndPage().
+
   return OK;
 }