Turn on wasm flags all the time, add a reference from wasm functions to the module.

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index b46f86c0b468143b9720028b2c503c980b4ee412..48ef1ac47eb0d0aec620455efc84ebf376affc52 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -471,15 +471,13 @@ DEFINE_BOOL(trace_turbo_escape, false, "enable tracing in escape analysis")
 DEFINE_BOOL(turbo_instruction_scheduling, false,
             "enable instruction scheduling in TurboFan")
 
-#if defined(V8_WASM)
 // Flags for native WebAssembly.
-DEFINE_BOOL(expose_wasm, true, "expose WASM interface to JavaScript")
+DEFINE_BOOL(expose_wasm, false, "expose WASM interface to JavaScript")
 DEFINE_BOOL(trace_wasm_decoder, false, "trace decoding of wasm code")
 DEFINE_BOOL(trace_wasm_decode_time, false, "trace decoding time of wasm code")
 DEFINE_BOOL(trace_wasm_compiler, false, "trace compiling of wasm code")
 DEFINE_BOOL(wasm_break_on_decoder_error, false,
             "debug break when wasm decoder encounters an error")
-#endif
 
 DEFINE_INT(typed_array_max_size_in_heap, 64,
            "threshold for in-heap typed array")