Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkColorCubeFilter.cpp

Index: src/effects/SkColorCubeFilter.cpp
diff --git a/src/effects/SkColorCubeFilter.cpp b/src/effects/SkColorCubeFilter.cpp
index 30641c3c30ea26208ca3b9b6838bae5851c4e7fc..18c5b5603f39989c488b790f231723205b3942ce 100644
--- a/src/effects/SkColorCubeFilter.cpp
+++ b/src/effects/SkColorCubeFilter.cpp
@@ -161,6 +161,15 @@
     }
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkColorCubeFilter::SkColorCubeFilter(SkReadBuffer& buffer)
+  : fCache(buffer.readInt()) {
+    fCubeData.reset(buffer.readByteArrayAsData());
+    buffer.validate(is_valid_3D_lut(fCubeData, fCache.cubeDimension()));
+    fUniqueID = SkNextColorCubeUniqueID();
+}
+#endif
+
 SkFlattenable* SkColorCubeFilter::CreateProc(SkReadBuffer& buffer) {
     int cubeDimension = buffer.readInt();
     SkAutoDataUnref cubeData(buffer.readByteArrayAsData());