Initial error handling code

src/effects/SkBlurMaskFilter.cpp

Index: src/effects/SkBlurMaskFilter.cpp
diff --git a/src/effects/SkBlurMaskFilter.cpp b/src/effects/SkBlurMaskFilter.cpp
index 6a5a39778cb73a6b1bdeeaf62a221437da389c34..ebc42ea87a804b504aa80d8ee06de8ed2b149125 100644
--- a/src/effects/SkBlurMaskFilter.cpp
+++ b/src/effects/SkBlurMaskFilter.cpp
@@ -106,6 +106,20 @@ SkMaskFilter* SkBlurMaskFilter::Create(SkBlurMaskFilter::BlurStyle style,
     return SkNEW_ARGS(SkBlurMaskFilterImpl, (sigma, style, flags));
 }
 
+SkFlattenable::Factory SkBlurMaskFilter::GetFactory(SkFlattenable::Type type) {
+    if (type == SkFlattenable::kSkBlurMaskFilterImpl_Type) {
+        return SkBlurMaskFilterImpl::CreateProc;
+    }
+    return NULL;
+}
+
+SkFlattenable::TypeCheck SkBlurMaskFilter::GetTypeCheck(SkFlattenable::Type type) {
+    if (type == SkFlattenable::kSkBlurMaskFilterImpl_Type) {
+        return SkBlurMaskFilterImpl::IsA;
+    }
+    return NULL;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 SkBlurMaskFilterImpl::SkBlurMaskFilterImpl(SkScalar sigma,