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

src/runtime/runtime-test.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include <memory>
 
 #include "src/arguments.h"
 #include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
@@ skipping 681 matching lines @@
     return isolate->heap()->false_value();
   }
   if (function->shared()->code() !=
       isolate->builtins()->builtin(Builtins::kInstantiateAsmJs)) {
     // Hasn't been compiled yet.
     return isolate->heap()->false_value();
   }
   return isolate->heap()->true_value();
 }
 
+namespace {
+bool DisallowCodegenFromStringsCallback(v8::Local<v8::Context> context) {
+  return false;
+}
+}
+
+RUNTIME_FUNCTION(Runtime_DisallowCodegenFromStrings) {
+  SealHandleScope shs(isolate);
+  DCHECK_EQ(0, args.length());
+  v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate);
+  v8_isolate->SetAllowCodeGenerationFromStringsCallback(
+      DisallowCodegenFromStringsCallback);
+  return isolate->heap()->undefined_value();
+}
+
 RUNTIME_FUNCTION(Runtime_IsWasmCode) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(JSFunction, function, 0);
   bool is_js_to_wasm = function->code()->kind() == Code::JS_TO_WASM_FUNCTION;
   return isolate->heap()->ToBoolean(is_js_to_wasm);
 }
 
 #define ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(Name)       \
   RUNTIME_FUNCTION(Runtime_Has##Name) {                  \
@@ skipping 128 matching lines @@
     CHECK(HeapObject::cast(*object)->map()->IsMap());
   } else {
     CHECK(object->IsSmi());
   }
 #endif
   return isolate->heap()->ToBoolean(true);
 }
 
 }  // namespace internal
 }  // namespace v8