I'm investigating how to make the IPC transfer a bit more secure on the

include/core/SkFlattenable.h

Index: include/core/SkFlattenable.h
diff --git a/include/core/SkFlattenable.h b/include/core/SkFlattenable.h
index 0b21abcc764c7aed2bd67f9a83c5162df3e222a9..181d2857e858ef7be55b1d16af827f168f0debec 100644
--- a/include/core/SkFlattenable.h
+++ b/include/core/SkFlattenable.h
@@ -27,7 +27,7 @@ class SkFlattenableWriteBuffer;
     }
 
 #define SK_DECLARE_UNFLATTENABLE_OBJECT() \
-    virtual Factory getFactory() SK_OVERRIDE { return NULL; }; \
+    virtual Factory getFactory() SK_OVERRIDE { return NULL; }
 
 #define SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(flattenable) \
     virtual Factory getFactory() SK_OVERRIDE { return CreateProc; } \
@@ -45,6 +45,8 @@ class SK_API SkFlattenable : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(SkFlattenable)
 
+    enum Type { FLATTENABLE, IMAGE_FILTER };
+
     typedef SkFlattenable* (*Factory)(SkFlattenableReadBuffer&);
 
     SkFlattenable() {}
@@ -54,6 +56,7 @@ public:
      override of flatten().
      */
     virtual Factory getFactory() = 0;
+    virtual bool isA(Type type) const { return FLATTENABLE == type; }
 
     static Factory NameToFactory(const char name[]);
     static const char* FactoryToName(Factory);