[wasm] Reduce usage of old Wasm.* API in JS tests.

test/mjsunit/wasm/wasm-object-api.js

Index: test/mjsunit/wasm/wasm-object-api.js
diff --git a/test/mjsunit/wasm/wasm-object-api.js b/test/mjsunit/wasm/wasm-object-api.js
index b8663b3b29b043690e3b885d4ca307e7b16be71c..2fa57b033bf73cd83e2a65223570ea6e37e94840 100644
--- a/test/mjsunit/wasm/wasm-object-api.js
+++ b/test/mjsunit/wasm/wasm-object-api.js
@@ -4,12 +4,19 @@
 
 // Flags: --expose-wasm
 
-assertFalse(undefined === Wasm);
-assertFalse(undefined == Wasm);
-assertEquals("function", typeof Wasm.verifyModule);
-assertEquals("function", typeof Wasm.verifyFunction);
-assertEquals("function", typeof Wasm.instantiateModule);
-assertFalse(undefined == Wasm.experimentalVersion);
+var oldApi = true;
+
+if (oldApi) {
+  assertFalse(undefined === Wasm);
+  assertFalse(undefined == Wasm);
+  assertEquals("function", typeof Wasm.verifyModule);
+  assertEquals("function", typeof Wasm.verifyFunction);
+  assertEquals("function", typeof Wasm.instantiateModule);
+  assertFalse(undefined == Wasm.experimentalVersion);
+} else {
+  assertTrue(undefined === Wasm);
+  assertTrue(undefined == Wasm);
+}
 
 assertEquals('object', typeof WebAssembly);
 assertEquals('function', typeof WebAssembly.Module);