[wasm] Table.Grow should grow dispatch tables

test/mjsunit/wasm/js-api.js

 // Copyright 2016 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.
 
 // Flags: --expose-wasm --allow-natives-syntax
 
 if ((typeof drainJobQueue) != "function") {
   drainJobQueue = () => { %RunMicrotasks() };
 }
 
@@ skipping 490 matching lines @@
 assertEq(set.call(tbl1, 0, null), undefined);
 assertEq(set.call(tbl1, 1, null), undefined);
 
 // 'WebAssembly.Table.prototype.grow' data property
 let tblGrowDesc = Object.getOwnPropertyDescriptor(tableProto, 'grow');
 assertEq(typeof tblGrowDesc.value, "function");
 assertEq(tblGrowDesc.enumerable, false);
 assertEq(tblGrowDesc.configurable, true);
 
 // 'WebAssembly.Table.prototype.grow' method
-if (false) { // TODO: Table.grow
 let tblGrow = tblGrowDesc.value;
 assertEq(tblGrow.length, 1);
 assertErrorMessage(() => tblGrow.call(), TypeError, /called on incompatible undefined/);
 assertErrorMessage(() => tblGrow.call({}), TypeError, /called on incompatible Object/);
 assertErrorMessage(() => tblGrow.call(tbl1, -1), RangeError, /bad Table grow delta/);
 assertErrorMessage(() => tblGrow.call(tbl1, Math.pow(2,32)), RangeError, /bad Table grow delta/);
 var tbl = new Table({element:"anyfunc", initial:1, maximum:2});
 assertEq(tbl.length, 1);
 assertEq(tbl.grow(0), 1);
 assertEq(tbl.length, 1);
 assertEq(tbl.grow(1), 1);
 assertEq(tbl.length, 2);
 assertErrorMessage(() => tbl.grow(1), Error, /failed to grow table/);
-}
 
 // 'WebAssembly.validate' function
 assertErrorMessage(() => WebAssembly.validate(), TypeError);
 assertErrorMessage(() => WebAssembly.validate("hi"), TypeError);
 assertEq(WebAssembly.validate(emptyModuleBinary), true);
 // TODO: other ways for validate to return false.
 assertEq(WebAssembly.validate(moduleBinaryImporting2Memories), false);
 assertEq(WebAssembly.validate(moduleBinaryWithMemSectionAndMemImport), false);
 
 // 'WebAssembly.compile' data property
@@ skipping 92 matching lines @@
   var result = null;
   instantiate(module_bytes, imports).then(r => result = r).catch(e => print(e));
   drainJobQueue();
   assertEq(result instanceof Instance, true);
 }
 assertInstantiateSuccess(emptyModuleBinary);
 assertInstantiateSuccess(emptyModuleBinary.buffer);
 assertInstantiateSuccess(importingModuleBinary, {"":{f:()=>{}}});
 assertInstantiateSuccess(importingModuleBinary.buffer, {"":{f:()=>{}}});
 assertInstantiateSuccess(memoryImportingModuleBinary, {"": {"my_memory": scratch_memory}});