Revert of Delete SkFlattenable::Type

gm/imagefiltersbase.cpp

Index: gm/imagefiltersbase.cpp
diff --git a/gm/imagefiltersbase.cpp b/gm/imagefiltersbase.cpp
index 3cb43a8392f0f9e976d87fa80fc2f3256b468325..e2e92356e09f49e0777032e82a3c3d115ebc0d4b 100644
--- a/gm/imagefiltersbase.cpp
+++ b/gm/imagefiltersbase.cpp
@@ -23,7 +23,8 @@
     public:
         Registrar() {
             SkFlattenable::Register("FailImageFilter",
-                                    FailImageFilter::CreateProc);
+                                    FailImageFilter::CreateProc,
+                                    FailImageFilter::GetFlattenableType());
         }
     };
     static sk_sp<SkImageFilter> Make() {
@@ -65,7 +66,8 @@
     public:
         Registrar() {
             SkFlattenable::Register("IdentityImageFilter",
-                                    IdentityImageFilter::CreateProc);
+                                    IdentityImageFilter::CreateProc,
+                                    IdentityImageFilter::GetFlattenableType());
         }
     };
     static sk_sp<SkImageFilter> Make(sk_sp<SkImageFilter> input) {