Replace boolean indications of strict mode by an enum value.

src/ast-inl.h

 // Copyright 2011 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 93 matching lines @@
 
 
 ForInStatement::ForInStatement(Isolate* isolate, ZoneStringList* labels)
     : IterationStatement(isolate, labels),
       each_(NULL),
       enumerable_(NULL),
       assignment_id_(GetNextId(isolate)) {
 }
 
 
-bool FunctionLiteral::strict_mode() const {
-  return scope()->is_strict_mode();
+StrictModeFlag FunctionLiteral::strict_mode_flag() const {
+  return scope()->strict_mode_flag();
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_INL_H_