[wasm][asm.js] Make asm.js->wasm return a regular object.

src/wasm/wasm-module.h

Index: src/wasm/wasm-module.h
diff --git a/src/wasm/wasm-module.h b/src/wasm/wasm-module.h
index ff5ed0fd178993ca6396522cf2e7fc18dc66f675..e718b9710b367f9538267ee9348f283e02af76d0 100644
--- a/src/wasm/wasm-module.h
+++ b/src/wasm/wasm-module.h
@@ -220,7 +220,8 @@ struct V8_EXPORT_PRIVATE WasmModule {
   static MaybeHandle<WasmInstanceObject> Instantiate(
       Isolate* isolate, ErrorThrower* thrower,
       Handle<WasmModuleObject> wasm_module, Handle<JSReceiver> ffi,
-      Handle<JSArrayBuffer> memory = Handle<JSArrayBuffer>::null());
+      Handle<JSArrayBuffer> memory = Handle<JSArrayBuffer>::null(),
+      Handle<JSObject> export_to = Handle<JSObject>::null());

[titzer, 2017/01/27 09:11:47]

It's not really clear to me why the object to which to export needs to be passed
in from the outside. We already do a origin check inside, so can't we just
create the right kind of exports object in wasm-module.cc and fish out the
"exports" property from the returned module in asm-js.cc?

[bradnelson, 2017/01/28 22:08:13]

Thought about doing it that way, but figured this was a smaller diff.
But probably a better structure.
Done.

 
   MaybeHandle<WasmCompiledModule> CompileFunctions(
       Isolate* isolate, Handle<Managed<WasmModule>> module_wrapper,