[wasm] Complete separation of compilation and instantiation

src/wasm/wasm-js.cc

Index: src/wasm/wasm-js.cc
diff --git a/src/wasm/wasm-js.cc b/src/wasm/wasm-js.cc
index 6dc14952a01e943b8bd5a9fc012c8d648c59dbae..fa9edf4d491f9c3e95c2ecd1808513c777d0c2b5 100644
--- a/src/wasm/wasm-js.cc
+++ b/src/wasm/wasm-js.cc
@@ -192,9 +192,14 @@ i::MaybeHandle<i::JSObject> InstantiateModuleCommon(
       memory = i::Handle<i::JSArrayBuffer>(i::JSArrayBuffer::cast(*mem_obj));
     }
 
-    object = result.val->Instantiate(isolate, ffi, memory);
-    if (!object.is_null()) {
-      args.GetReturnValue().Set(v8::Utils::ToLocal(object.ToHandleChecked()));
+    i::MaybeHandle<i::FixedArray> compiled_module =
+        result.val->CompileFunctions(isolate);
+    if (!compiled_module.is_null()) {
+      object = i::wasm::WasmModule::Instantiate(
+          isolate, compiled_module.ToHandleChecked(), ffi, memory);
+      if (!object.is_null()) {
+        args.GetReturnValue().Set(v8::Utils::ToLocal(object.ToHandleChecked()));
+      }
     }
   }