Direct call to eval passes strict mode through.

src/codegen-inl.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 37 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 Handle<Script> CodeGenerator::script() { return info_->script(); }
 
 bool CodeGenerator::is_eval() { return info_->is_eval(); }
 
 Scope* CodeGenerator::scope() { return info_->function()->scope(); }
 
+StrictModeFlag CodeGenerator::strict_mode_flag() {
+  return info_->function()->strict_mode() ? kStrictMode : kNonStrictMode;
+}
+
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_INL_H_