[wasm][asm.js] Allow asm.js->wasm codegen in unsafe-eval situations.

src/wasm/wasm-module.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 <memory>
 
 #include "src/assembler-inl.h"
 #include "src/base/adapters.h"
 #include "src/base/atomic-utils.h"
 #include "src/code-stubs.h"
@@ skipping 2219 matching lines @@
          isolate->allow_code_gen_callback()(v8::Utils::ToLocal(context));
 }
 
 // TODO(clemensh): origin can be inferred from asm_js_script; remove it.
 MaybeHandle<WasmModuleObject> wasm::CreateModuleObjectFromBytes(
     Isolate* isolate, const byte* start, const byte* end, ErrorThrower* thrower,
     ModuleOrigin origin, Handle<Script> asm_js_script,
     Vector<const byte> asm_js_offset_table_bytes) {
   MaybeHandle<WasmModuleObject> nothing;
 
-  if (!IsWasmCodegenAllowed(isolate, isolate->native_context())) {
+  if (origin != kAsmJsOrigin &&
+      !IsWasmCodegenAllowed(isolate, isolate->native_context())) {
     thrower->CompileError("Wasm code generation disallowed in this context");
     return nothing;
   }
 
   ModuleResult result = DecodeWasmModule(isolate, start, end, false, origin);
   if (result.failed()) {
     if (result.val) delete result.val;
     thrower->CompileFailed("Wasm decoding failed", result);
     return nothing;
   }
@@ skipping 430 matching lines @@
 
     JSObject::AddProperty(entry, name_string, export_name.ToHandleChecked(),
                           NONE);
     JSObject::AddProperty(entry, kind_string, export_kind, NONE);
 
     storage->set(index, *entry);
   }
 
   return array_object;
 }