Add WasmFrame, backtraces reflect wasm's presence

test/mjsunit/wasm/stack.js

Index: test/mjsunit/wasm/stack.js
diff --git a/test/mjsunit/wasm/stack.js b/test/mjsunit/wasm/stack.js
index d4b72c00856482a527cb5e12c607a8ffee2aa6db..3bf41726423ae7573adb63f8a088316afe3bceb8 100644
--- a/test/mjsunit/wasm/stack.js
+++ b/test/mjsunit/wasm/stack.js
@@ -62,8 +62,11 @@ function check_STACK() {
 var expected = "Error\n" +
     // The line numbers below will change as this test gains / loses lines..
     "    at STACK (stack.js:54:11)\n" +  // --
+    "    at <WASM> (<anonymous>)\n" +  // --
+    "    at <WASM> (<anonymous>)\n" +  // --
+    "    at <WASM> (<anonymous>)\n" +  // --
     "    at testStack (stack.js:43:10)\n" +
     // TODO(jfb) Add WebAssembly stack here.
-    "    at stack.js:69:1";
+    "    at stack.js:72:1";
 
 testStack(STACK, check_STACK);