[snapshot] encode resource before serializing.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index cd3a0e3e672e2f476cf3e968d8fc08f39c2ad3a2..ec512f4a5023274c82e9c0d0de1e4ac3450c4cbc 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -178,10 +178,6 @@ using v8::MemoryPressureLevel;
   V(Object, instanceof_cache_function, InstanceofCacheFunction)                \
   V(Object, instanceof_cache_map, InstanceofCacheMap)                          \
   V(Object, instanceof_cache_answer, InstanceofCacheAnswer)                    \
-  V(FixedArray, natives_source_cache, NativesSourceCache)                      \
-  V(FixedArray, extra_natives_source_cache, ExtraNativesSourceCache)           \
-  V(FixedArray, experimental_extra_natives_source_cache,                       \
-    ExperimentalExtraNativesSourceCache)                                       \
   /* Lists and dictionaries */                                                 \
   V(NameDictionary, empty_properties_dictionary, EmptyPropertiesDictionary)    \
   V(NameDictionary, public_symbol_table, PublicSymbolTable)                    \