Simplify flattening to just write enough to call the factory

include/core/SkPathEffect.h

Index: include/core/SkPathEffect.h
diff --git a/include/core/SkPathEffect.h b/include/core/SkPathEffect.h
index 562025351e8563f0a29cefc312c89eda4a52ce10..454614a262ea901de7b97a486bac384f07711b0a 100644
--- a/include/core/SkPathEffect.h
+++ b/include/core/SkPathEffect.h
@@ -135,7 +135,9 @@ public:
 
 protected:
     SkPathEffect() {}
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
     SkPathEffect(SkReadBuffer& buffer) : INHERITED(buffer) {}
+#endif
 
 private:
     // illegal
@@ -157,7 +159,10 @@ public:
 
 protected:
     SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1);
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
     SkPairPathEffect(SkReadBuffer&);
+#endif
+
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
     // these are visible to our subclasses
@@ -191,7 +196,10 @@ public:
 protected:
     SkComposePathEffect(SkPathEffect* outer, SkPathEffect* inner)
         : INHERITED(outer, inner) {}
+
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
     explicit SkComposePathEffect(SkReadBuffer& buffer) : INHERITED(buffer) {}
+#endif
 
 private:
     // illegal
@@ -225,7 +233,10 @@ public:
 protected:
     SkSumPathEffect(SkPathEffect* first, SkPathEffect* second)
         : INHERITED(first, second) {}
+
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
     explicit SkSumPathEffect(SkReadBuffer& buffer) : INHERITED(buffer) {}
+#endif
 
 private:
     // illegal