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

printing/printed_document_mac.cc

Index: printing/printed_document_mac.cc
diff --git a/printing/printed_document_mac.cc b/printing/printed_document_mac.cc
index 26515167a6a575dbc8ad403538f6395279dd1022..de14eb2ab879c0ae042f2f66b1f63c3985e3c08f 100644
--- a/printing/printed_document_mac.cc
+++ b/printing/printed_document_mac.cc
@@ -13,7 +13,7 @@
 
 namespace printing {
 
-void PrintedDocument::RenderPrintedPage(
+bool PrintedDocument::RenderPrintedPage(
     const PrintedPage& page, gfx::NativeDrawingContext context) const {
 #ifndef NDEBUG
   {
@@ -35,7 +35,7 @@ void PrintedDocument::RenderPrintedPage(
   const int page_number = 1;
   metafile->RenderPage(page_number, context, content_area.ToCGRect(),
                        false, false, false, false);
-
+  return true;
   // TODO(stuartmorgan): Print the header and footer.
 }