Revert of clean up printing::Image and printing::Metafile

printing/emf_win.h

Index: printing/emf_win.h
diff --git a/printing/emf_win.h b/printing/emf_win.h
index c9a8f604724766f774ba77dc3cb055b3f267a28e..c66e9f24b989745c59ec07296e6ee67bc0a86826 100644
--- a/printing/emf_win.h
+++ b/printing/emf_win.h
@@ -77,18 +77,8 @@
 
   unsigned int GetPageCount() const override;
   HDC context() const override;
-
+  bool Playback(HDC hdc, const RECT* rect) const override;
   bool SafePlayback(HDC hdc) const override;
-
-  // "Plays" the EMF buffer in a HDC. It is the same effect as calling the
-  // original GDI function that were called when recording the EMF. |rect| is in
-  // "logical units" and is optional. If |rect| is NULL, the natural EMF bounds
-  // are used.
-  // Note: Windows has been known to have stack buffer overflow in its GDI
-  // functions, whether used directly or indirectly through precompiled EMF
-  // data. We have to accept the risk here. Since it is used only for printing,
-  // it requires user intervention.
-  bool Playback(HDC hdc, const RECT* rect) const;
 
   HENHMETAFILE emf() const { return emf_; }