Initial error handling code

include/core/SkShader.h

Index: include/core/SkShader.h
diff --git a/include/core/SkShader.h b/include/core/SkShader.h
index 74f611d3e53b2eabd84eb566ddd0059c71104020..93fd71a4f6ee845830f192f97e1efcbc1b3436cc 100644
--- a/include/core/SkShader.h
+++ b/include/core/SkShader.h
@@ -30,6 +30,8 @@ class GrEffectRef;
  *  to be modified.
  */
 class SK_API SkShader : public SkFlattenable {
+    typedef SkFlattenable INHERITED;
+
 public:
     SK_DECLARE_INST_COUNT(SkShader)
 
@@ -344,6 +346,8 @@ public:
 
     SkDEVCODE(virtual void toString(SkString* str) const;)
 
+    SK_DEFINE_FLATTENABLE_TYPE(SkShader)
+
 protected:
     enum MatrixClass {
         kLinear_MatrixClass,            // no perspective
@@ -372,7 +376,6 @@ private:
                                         TileMode, TileMode,
                                         void* storage, size_t storageSize);
     friend class SkAutoBitmapShaderInstall;
-    typedef SkFlattenable INHERITED;
 };
 
 #endif