Allow the resolved names cache to be lazily created like the exported names cache.

runtime/vm/raw_object_snapshot.cc

Index: runtime/vm/raw_object_snapshot.cc
diff --git a/runtime/vm/raw_object_snapshot.cc b/runtime/vm/raw_object_snapshot.cc
index 7e823b75b222279306eb1d79772ede372273a827..186b18981a317e1be833423ce77546d99baccf0d 100644
--- a/runtime/vm/raw_object_snapshot.cc
+++ b/runtime/vm/raw_object_snapshot.cc
@@ -1155,14 +1155,11 @@ RawLibrary* Library::ReadFrom(SnapshotReader* reader,
       library.StorePointer((library.raw()->from() + i),
                            reader->PassiveObjectHandle()->raw());
     }
-    // Initialize cache of resolved names.
-    const intptr_t kInitialNameCacheSize = 64;
-    // The cache of resolved names in library scope is not serialized.
-    library.InitResolvedNamesCache(kInitialNameCacheSize);
-    library.Register(reader->thread());
+    // Initialize caches that are not serialized.
+    library.StorePointer(&library.raw_ptr()->resolved_names_, Array::null());
     library.StorePointer(&library.raw_ptr()->exported_names_, Array::null());
-    // Initialize cache of loaded scripts.
     library.StorePointer(&library.raw_ptr()->loaded_scripts_, Array::null());
+    library.Register(reader->thread());
   }
   return library.raw();
 }