Add support for serializing/deserializing of SkDrawable

src/core/SkGlobalInitialization_core.cpp

Index: src/core/SkGlobalInitialization_core.cpp
diff --git a/src/core/SkGlobalInitialization_core.cpp b/src/core/SkGlobalInitialization_core.cpp
index d7b4a800038cf6b60ef74aeb2c2f74bd2c92a9ce..e377437a9916c41ec0c1056d931692471a8db29a 100644
--- a/src/core/SkGlobalInitialization_core.cpp
+++ b/src/core/SkGlobalInitialization_core.cpp
@@ -14,10 +14,11 @@
 #include "SkFlattenable.h"
 #include "SkImageShader.h"
 #include "SkLocalMatrixShader.h"
+#include "SkMatrixImageFilter.h"
 #include "SkOnce.h"
 #include "SkPathEffect.h"
 #include "SkPictureShader.h"
-#include "SkMatrixImageFilter.h"
+#include "SkRecordedDrawable.h"
 #include "SkXfermode.h"
 
 /*
@@ -49,6 +50,9 @@ void SkFlattenable::PrivateInitializer::InitCore() {
     // Xfermode
     SkXfermode::InitializeFlattenables();
 
+    // Drawable
+    SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkRecordedDrawable)
+
     // Now initialize any optional/additional effects (implemented in src/ports)
     InitEffects();
 };