Make sp variants for SkData

src/effects/SkColorCubeFilter.cpp

Index: src/effects/SkColorCubeFilter.cpp
diff --git a/src/effects/SkColorCubeFilter.cpp b/src/effects/SkColorCubeFilter.cpp
index 44aaf8b830545c933bbebecae5ebb230eaf89bba..d59f123a80aaf0bfd2c37f6650571873a0f8f6c2 100644
--- a/src/effects/SkColorCubeFilter.cpp
+++ b/src/effects/SkColorCubeFilter.cpp
@@ -138,17 +138,17 @@ void SkColorCubeFilter::filterSpan(const SkPMColor src[], int count, SkPMColor d
 
 SkFlattenable* SkColorCubeFilter::CreateProc(SkReadBuffer& buffer) {
     int cubeDimension = buffer.readInt();
-    SkAutoDataUnref cubeData(buffer.readByteArrayAsData());
-    if (!buffer.validate(is_valid_3D_lut(cubeData, cubeDimension))) {
+    auto cubeData(buffer.readByteArrayAsData());
+    if (!buffer.validate(is_valid_3D_lut(cubeData.get(), cubeDimension))) {
         return nullptr;
     }
-    return Create(cubeData, cubeDimension);
+    return Create(cubeData.get(), cubeDimension);
 }
 
 void SkColorCubeFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeInt(fCache.cubeDimension());
-    buffer.writeDataAsByteArray(fCubeData);
+    buffer.writeDataAsByteArray(fCubeData.get());
 }
 
 #ifndef SK_IGNORE_TO_STRING