[wasm] Support validation of asm.js modules with != 3 args.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 795b0199bd9aa291e7e057979656b867983bec03..6734a2ed42e58eeccc7e5e591730cac282fca6b4 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1429,7 +1429,9 @@ bool Compiler::EnsureDeoptimizationSupport(CompilationInfo* info) {
     // TODO(4280): For now we play it safe and remove the bytecode array when we
     // switch to baseline code. We might consider keeping around the bytecode so
     // that it can be used as the "source of truth" eventually.
-    shared->ClearBytecodeArray();
+    if (shared->HasBytecodeArray()) {
+      shared->ClearBytecodeArray();
+    }
 
     // The scope info might not have been set if a lazily compiled
     // function is inlined before being called for the first time.