Reland 103021: Printing preview of a PDF on Mac with Skia only previews the last page of the PDF

skia/ext/platform_device.h

Index: skia/ext/platform_device.h
diff --git a/skia/ext/platform_device.h b/skia/ext/platform_device.h
index 179a8e8bfa33facd13baaf209cb414d207359fc3..3973f8a3d72a711c398de1c5fc62483916323a14 100644
--- a/skia/ext/platform_device.h
+++ b/skia/ext/platform_device.h
@@ -18,6 +18,7 @@
 #include "third_party/skia/include/core/SkColor.h"
 
 class SkMatrix;
+class SkMetaData;
 class SkPath;
 class SkRegion;
 
@@ -78,6 +79,17 @@ SK_API void InitializeDC(HDC context);
 SK_API CGContextRef GetBitmapContext(SkDevice* device);
 #endif
 
+// Following routines are used in print preview workflow to mark the draft mode
+// metafile and preview metafile.
+SK_API SkMetaData& getMetaData(const SkCanvas& canvas);
+SK_API void SetIsDraftMode(const SkCanvas& canvas, bool draft_mode);
+SK_API bool IsDraftMode(const SkCanvas& canvas);
+
+#if defined(OS_MACOSX) || defined(OS_WIN)
+SK_API void SetIsPreviewMetafile(const SkCanvas& canvas, bool is_preview);
+SK_API bool IsPreviewMetafile(const SkCanvas& canvas);
+#endif
+
 // A SkDevice is basically a wrapper around SkBitmap that provides a surface for
 // SkCanvas to draw into. PlatformDevice provides a surface Windows can also
 // write to. It also provides functionality to play well with GDI drawing