Make sure to use the correct context for eval checks

src/builtins/builtins.cc

 // Copyright 2012 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/builtins/builtins.h"
 #include "src/code-events.h"
 #include "src/code-stub-assembler.h"
 #include "src/ic/ic-state.h"
 #include "src/interface-descriptors.h"
 #include "src/isolate.h"
@@ skipping 262 matching lines @@
     return Handle<Code>(code_address);                                        \
   }
 BUILTIN_LIST_ALL(DEFINE_BUILTIN_ACCESSOR)
 #undef DEFINE_BUILTIN_ACCESSOR
 
 // static
 bool Builtins::AllowDynamicFunction(Isolate* isolate, Handle<JSFunction> target,
                                     Handle<JSObject> target_global_proxy) {
   if (FLAG_allow_unsafe_function_constructor) return true;
   HandleScopeImplementer* impl = isolate->handle_scope_implementer();
-  Handle<Context> responsible_context = impl->LastEnteredContext();
+  Handle<Context> responsible_context =
+      impl->MicrotaskContextIsLastEnteredContext() ? impl->MicrotaskContext()
+                                                   : impl->LastEnteredContext();
+  // TODO(jochen): Remove this.
   if (responsible_context.is_null()) {
-    responsible_context = impl->MicrotaskContext();
-    // TODO(jochen): Remove this.
-    if (responsible_context.is_null()) {
-      return true;
-    }
+    return true;
   }
   if (*responsible_context == target->context()) return true;
   return isolate->MayAccess(responsible_context, target_global_proxy);
 }
 
 }  // namespace internal
 }  // namespace v8