Remove wasm compile time option and enable wasm behind a runtime flag.

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index a1714ac269d5462ffdc6a6f32eb7ef8d6779c901..99c1c8d40007c10d33dc68f4da9adb66d491adda 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -176,9 +176,6 @@
   # issue 4078:
   'allocation-site-info': [PASS, NO_VARIANTS],
 
-  # Native WASM is not yet enabled by default.
-  'wasm/*': [SKIP],
-
   ##############################################################################
   # Too slow in debug mode with --stress-opt mode.
   'compiler/regress-stacktrace-methods': [PASS, ['mode == debug', SKIP]],
@@ -299,6 +296,9 @@
   'regress/regress-crbug-474297': [PASS, ['mode == debug', SLOW]],
   'strong/implicit-conversions': [PASS, SLOW],
   'strong/load-element-mutate-backing-store': [PASS, SLOW],
+
+  # TODO(bradnelson): Enable tests in a separate change.
+  'wasm/*': [SKIP],
 }],  # ALWAYS
 
 ['novfp3 == True', {
@@ -761,6 +761,9 @@
   'regress/debug*': [SKIP],
   'regress/regress-debug*': [SKIP],
 
+  # TODO(bradnelson): Figure out why these tests fail with ignition.
+  'wasm/*': [SKIP],
+
   'allocation-folding': [SKIP],
   'api-call-after-bypassed-exception': [SKIP],
   'apply-arguments-gc-safepoint': [SKIP],