[wasm] Binary 11: AST changes.

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 83009d7c81def5acbd56bc711fc5f2c5528db216..833c39902559e4d86bea1a1b82e27282d6a97b6e 100644
--- a/src/wasm/wasm-js.cc
+++ b/src/wasm/wasm-js.cc
@@ -294,6 +294,15 @@ void WasmJs::Install(Isolate* isolate, Handle<JSGlobalObject> global) {
   InstallFunc(isolate, wasm_object, "instantiateModule", InstantiateModule);
   InstallFunc(isolate, wasm_object, "instantiateModuleFromAsm",
               InstantiateModuleFromAsm);
+
+  {
+    // Add the Wasm.experimentalVersion property.
+    Handle<String> name = v8_str(isolate, "experimentalVersion");
+    PropertyAttributes attributes =
+        static_cast<PropertyAttributes>(DONT_DELETE | READ_ONLY);
+    Handle<Smi> value = Handle<Smi>(Smi::FromInt(wasm::kWasmVersion), isolate);
+    JSObject::AddProperty(wasm_object, name, value, attributes);
+  }
 }