[wasm][asm.js] Store foreign init function for asm.js as internal field.

src/asmjs/asm-js.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/asmjs/asm-js.h"
 
 #include "src/api-natives.h"
 #include "src/api.h"
 #include "src/asmjs/asm-typer.h"
 #include "src/asmjs/asm-wasm-builder.h"
@@ skipping 260 matching lines @@
                           foreign, NONE);
   }
 
   i::MaybeHandle<i::JSObject> maybe_module_object =
       i::wasm::WasmModule::Instantiate(isolate, &thrower, module, ffi_object,
                                        memory);
   if (maybe_module_object.is_null()) {
     return MaybeHandle<Object>();
   }
 
-  i::Handle<i::Name> init_name(isolate->factory()->InternalizeUtf8String(
-      wasm::AsmWasmBuilder::foreign_init_name));
+  i::Handle<i::JSObject> module_object = maybe_module_object.ToHandleChecked();
+  i::Handle<i::Object> init(
+      module->GetInternalField(WasmModuleObject::kAsmForeignInit), isolate);
+  DCHECK(!init.is_null());
 
-  i::Handle<i::Object> module_object = maybe_module_object.ToHandleChecked();
-  i::MaybeHandle<i::Object> maybe_init =
-      i::Object::GetProperty(module_object, init_name);
-  DCHECK(!maybe_init.is_null());
-
-  i::Handle<i::Object> init = maybe_init.ToHandleChecked();
   i::Handle<i::Object> undefined(isolate->heap()->undefined_value(), isolate);
   i::Handle<i::Object>* foreign_args_array =
       new i::Handle<i::Object>[foreign_globals->length()];
   for (int j = 0; j < foreign_globals->length(); j++) {
     if (!foreign.is_null()) {
       i::MaybeHandle<i::Name> name = i::Object::ToName(
           isolate, i::Handle<i::Object>(foreign_globals->get(j), isolate));
       if (!name.is_null()) {
         i::MaybeHandle<i::Object> val =
             i::Object::GetProperty(foreign, name.ToHandleChecked());
@@ skipping 43 matching lines @@
   message->set_error_level(v8::Isolate::kMessageInfo);
   if (!FLAG_suppress_asm_messages && FLAG_trace_asm_time) {
     MessageHandler::ReportMessage(isolate, &location, message);
   }
 
   return module_object;
 }
 
 }  // namespace internal
 }  // namespace v8