Follow up to serialization validation code

src/core/SkValidatingReadBuffer.h

Index: src/core/SkValidatingReadBuffer.h
diff --git a/src/core/SkValidatingReadBuffer.h b/src/core/SkValidatingReadBuffer.h
index accf5d75f9a33dc8eceaa941f24d50f98a107346..e1af3b3732c851a647f448482fd0a44c1e2add3f 100644
--- a/src/core/SkValidatingReadBuffer.h
+++ b/src/core/SkValidatingReadBuffer.h
@@ -49,7 +49,6 @@ public:
     virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encoding) SK_OVERRIDE;
 
     // common data structures
-    virtual SkFlattenable* readFlattenable() SK_OVERRIDE;
     virtual void readPoint(SkPoint* point) SK_OVERRIDE;
     virtual void readMatrix(SkMatrix* matrix) SK_OVERRIDE;
     virtual void readIRect(SkIRect* rect) SK_OVERRIDE;
@@ -109,6 +108,10 @@ public:
         fBitmapDecoder = bitmapDecoder;
     }
 
+protected:
+    // Use readFlattenableT to enforce a type check on the flattenable read
+    virtual SkFlattenable* readFlattenable() SK_OVERRIDE;
+
 private:
     void setMemory(const void* data, size_t size);