Revert of Revert "De-virtualize SkCanvas save/restore."

include/utils/SkDeferredCanvas.h

Index: include/utils/SkDeferredCanvas.h
diff --git a/include/utils/SkDeferredCanvas.h b/include/utils/SkDeferredCanvas.h
index b26ddbc952bc623e7df269bd77e263a38f35b158..210b7fb1894c70a17de77efee1af1ed49ea5fec3 100644
--- a/include/utils/SkDeferredCanvas.h
+++ b/include/utils/SkDeferredCanvas.h
@@ -138,10 +138,6 @@
     void silentFlush();
 
     // Overrides of the SkCanvas interface
-    virtual int save(SaveFlags flags) SK_OVERRIDE;
-    virtual int saveLayer(const SkRect* bounds, const SkPaint* paint,
-                          SaveFlags flags) SK_OVERRIDE;
-    virtual void restore() SK_OVERRIDE;
     virtual bool isDrawingToLayer() const SK_OVERRIDE;
     virtual bool translate(SkScalar dx, SkScalar dy) SK_OVERRIDE;
     virtual bool scale(SkScalar sx, SkScalar sy) SK_OVERRIDE;
@@ -193,6 +189,10 @@
     virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE;
 
 protected:
+    virtual void onSave(SaveFlags) SK_OVERRIDE;
+    virtual bool onSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK_OVERRIDE;
+    virtual void onRestore() SK_OVERRIDE;
+
     virtual void onDrawDRRect(const SkRRect&, const SkRRect&,
                               const SkPaint&) SK_OVERRIDE;