PrintPreview: Printing preview of a PDF on Mac with Skia only previews the last page of the PDF

chrome/renderer/print_web_view_helper_mac.mm

Index: chrome/renderer/print_web_view_helper_mac.mm
diff --git a/chrome/renderer/print_web_view_helper_mac.mm b/chrome/renderer/print_web_view_helper_mac.mm
index 0e8c3b24133f3036f2bfdad5ef2ef4a43ad671cf..81bae400039df74ca3ba56f93e8f31aec028ba42 100644
--- a/chrome/renderer/print_web_view_helper_mac.mm
+++ b/chrome/renderer/print_web_view_helper_mac.mm
@@ -37,7 +37,7 @@ void PrintWebViewHelper::PrintPageInternal(
   // Render page for printing.
   gfx::Rect content_area(params.params.printable_size);
   RenderPage(params.params.printable_size, content_area, scale_factor,
-             page_number, frame, &metafile);
+             page_number, frame, &metafile, false);
   metafile.FinishDocument();
 
   PrintHostMsg_DidPrintPage_Params page_params;
@@ -96,7 +96,7 @@ bool PrintWebViewHelper::RenderPreviewPage(int page_number) {
 
   base::TimeTicks begin_time = base::TimeTicks::Now();
   RenderPage(printParams.page_size, content_area, scale_factor, page_number,
-             print_preview_context_.frame(), initial_render_metafile);
+             print_preview_context_.frame(), initial_render_metafile, true);
   print_preview_context_.RenderedPreviewPage(
       base::TimeTicks::Now() - begin_time);
 
@@ -144,7 +144,7 @@ bool PrintWebViewHelper::RenderPreviewPage(int page_number) {
 void PrintWebViewHelper::RenderPage(
     const gfx::Size& page_size, const gfx::Rect& content_area,
     const float& scale_factor, int page_number, WebFrame* frame,
-    printing::Metafile* metafile) {
+    printing::Metafile* metafile, bool is_preview) {
 
   {
 #if defined(USE_SKIA)
@@ -159,6 +159,8 @@ void PrintWebViewHelper::RenderPage(
     printing::MetafileSkiaWrapper::SetMetafileOnCanvas(canvas.get(), metafile);
     printing::MetafileSkiaWrapper::SetDraftMode(canvas.get(),
                                                 is_print_ready_metafile_sent_);
+    printing::MetafileSkiaWrapper::SetIsPreviewMetafile(canvas.get(),
+                                                        is_preview);
 #else
     bool success = metafile->StartPage(page_size, content_area, scale_factor);
     DCHECK(success);