[wasm] Introduce instance types for WebAssembly.* objects.

src/compiler/types.cc

Index: src/compiler/types.cc
diff --git a/src/compiler/types.cc b/src/compiler/types.cc
index 9c667137b509235ab5bcd32708823eb1d75aa6ee..4f8d0c6d32aecd8daf4bce699fc351c7a6b620a5 100644
--- a/src/compiler/types.cc
+++ b/src/compiler/types.cc
@@ -267,6 +267,10 @@ Type::bitset BitsetType::Lub(i::Map* map) {
     case JS_WEAK_SET_TYPE:
     case JS_PROMISE_CAPABILITY_TYPE:
     case JS_PROMISE_TYPE:
+    case WASM_MODULE_TYPE:
+    case WASM_INSTANCE_TYPE:
+    case WASM_MEMORY_TYPE:
+    case WASM_TABLE_TYPE:
       DCHECK(!map->is_callable());
       DCHECK(!map->is_undetectable());
       return kOtherObject;