Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

include/effects/Sk2DPathEffect.h

Index: include/effects/Sk2DPathEffect.h
diff --git a/include/effects/Sk2DPathEffect.h b/include/effects/Sk2DPathEffect.h
index 97c86ec7f28580f9b44b2637d8d90a336daac0ab..80a27a37935c1fe09b9f050e35f632129042a8a8 100644
--- a/include/effects/Sk2DPathEffect.h
+++ b/include/effects/Sk2DPathEffect.h
@@ -39,6 +39,9 @@
 
     // protected so that subclasses can call this during unflattening
     explicit Sk2DPathEffect(const SkMatrix& mat);
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+    explicit Sk2DPathEffect(SkReadBuffer&);
+#endif
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
 private:
@@ -67,6 +70,10 @@
 protected:
     SkLine2DPathEffect(SkScalar width, const SkMatrix& matrix)
         : Sk2DPathEffect(matrix), fWidth(width) {}
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+    explicit SkLine2DPathEffect(SkReadBuffer&);
+#endif
+
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
     virtual void nextSpan(int u, int v, int ucount, SkPath*) const SK_OVERRIDE;
@@ -91,6 +98,9 @@
 
 protected:
     SkPath2DPathEffect(const SkMatrix&, const SkPath&);
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+    explicit SkPath2DPathEffect(SkReadBuffer& buffer);
+#endif
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
     virtual void next(const SkPoint&, int u, int v, SkPath*) const SK_OVERRIDE;