[wasm] Override mechanism for wasm js APIs

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index a1e8c3161faa5c2b56628851695f2ffba39e1974..63d58fd29c896fa03722316bbe3c1d11cadc6c9c 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -397,6 +397,10 @@ typedef List<HeapObject*> DebugObjectCache;
   V(AllowCodeGenerationFromStringsCallback, allow_code_gen_callback, nullptr) \
   V(AllowWasmCompileCallback, allow_wasm_compile_callback, nullptr)           \
   V(AllowWasmInstantiateCallback, allow_wasm_instantiate_callback, nullptr)   \
+  V(ExtensionCallback, wasm_module_callback, &NoExtension)                    \
+  V(ExtensionCallback, wasm_instance_callback, &NoExtension)                  \
+  V(ExtensionCallback, wasm_compile_callback, &NoExtension)                   \
+  V(ExtensionCallback, wasm_instantiate_callback, &NoExtension)               \
   V(ExternalReferenceRedirectorPointer*, external_reference_redirector,       \
     nullptr)                                                                  \
   /* State for Relocatable. */                                                \