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

src/objects-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include "src/assembler-inl.h"
 #include "src/bootstrapper.h"
 #include "src/disasm.h"
 #include "src/disassembler.h"
@@ skipping 92 matching lines @@
       Code::cast(this)->CodeVerify();
       break;
     case ODDBALL_TYPE:
       Oddball::cast(this)->OddballVerify();
       break;
     case JS_OBJECT_TYPE:
     case JS_ERROR_TYPE:
     case JS_API_OBJECT_TYPE:
     case JS_SPECIAL_API_OBJECT_TYPE:
     case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
+    case WASM_INSTANCE_TYPE:
+    case WASM_MEMORY_TYPE:
+    case WASM_MODULE_TYPE:
+    case WASM_TABLE_TYPE:
       JSObject::cast(this)->JSObjectVerify();
       break;
     case JS_ARGUMENTS_TYPE:
       JSArgumentsObject::cast(this)->JSArgumentsObjectVerify();
       break;
     case JS_GENERATOR_OBJECT_TYPE:
       JSGeneratorObject::cast(this)->JSGeneratorObjectVerify();
       break;
     case JS_ASYNC_GENERATOR_OBJECT_TYPE:
       JSAsyncGeneratorObject::cast(this)->JSAsyncGeneratorObjectVerify();
@@ skipping 1593 matching lines @@
 
   // Both are done at the same time.
   CHECK_EQ(new_it.done(), old_it.done());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8