[External patch] Source-over support for SkLumaXfermode.

src/ports/SkGlobalInitialization_default.cpp

Index: src/ports/SkGlobalInitialization_default.cpp
diff --git a/src/ports/SkGlobalInitialization_default.cpp b/src/ports/SkGlobalInitialization_default.cpp
index 21b15a6182a9cade155161ff48b01e9989f5d166..9a0d8dfbeacdc63fabfb377be418db1808b194ba 100644
--- a/src/ports/SkGlobalInitialization_default.cpp
+++ b/src/ports/SkGlobalInitialization_default.cpp
@@ -88,7 +88,6 @@ void SkFlattenable::InitializeFlattenables() {
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLayerDrawLooper)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLayerRasterizer)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLerpXfermode)
-    SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLumaMaskXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPath1DPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(Sk2DPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLine2DPathEffect)
@@ -115,6 +114,7 @@ void SkFlattenable::InitializeFlattenables() {
     SkGradientShader::InitializeFlattenables();
     SkImages::InitializeFlattenables();
     SkLightingImageFilter::InitializeFlattenables();
+    SkLumaMaskXfermode::InitializeFlattenables();
     SkTableColorFilter::InitializeFlattenables();
     SkXfermode::InitializeFlattenables();
 }