Follow up to serialization validation code

src/core/SkOrderedReadBuffer.h

Index: src/core/SkOrderedReadBuffer.h
diff --git a/src/core/SkOrderedReadBuffer.h b/src/core/SkOrderedReadBuffer.h
index 556fce8b41495a4790bf48074dcb3ed951611439..64c24def5ea55bc681c50a3a6b25e6053107c717 100644
--- a/src/core/SkOrderedReadBuffer.h
+++ b/src/core/SkOrderedReadBuffer.h
@@ -52,7 +52,6 @@ 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;
@@ -112,6 +111,10 @@ public:
         fBitmapDecoder = bitmapDecoder;
     }
 
+protected:
+    // Use readFlattenableT to enforce a type check on the flattenable read
+    virtual SkFlattenable* readFlattenable() SK_OVERRIDE;
+
 private:
     SkReader32 fReader;
     void* fMemoryPtr;