Introduce extended mode.

src/scopeinfo.cc

 // 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 61 matching lines @@
   const int parameter_count = scope->num_parameters();
   const int length = kVariablePartIndex
       + parameter_count + stack_local_count + 2 * context_local_count
       + (has_function_name ? 2 : 0);
 
   Handle<ScopeInfo> scope_info = FACTORY->NewScopeInfo(length);
 
   // Encode the flags.
   int flags = TypeField::encode(scope->type()) |
       CallsEvalField::encode(scope->calls_eval()) |
-      StrictModeField::encode(scope->is_strict_mode()) |
+      LanguageModeField::encode(scope->language_mode()) |
       FunctionVariableField::encode(function_name_info) |
       FunctionVariableMode::encode(function_variable_mode);
   scope_info->SetFlags(flags);
   scope_info->SetParameterCount(parameter_count);
   scope_info->SetStackLocalCount(stack_local_count);
   scope_info->SetContextLocalCount(context_local_count);
 
   int index = kVariablePartIndex;
   // Add parameters.
   ASSERT(index == scope_info->ParameterEntriesIndex());
@@ skipping 63 matching lines @@
   ASSERT(length() > 0);
   return TypeField::decode(Flags());
 }
 
 
 bool ScopeInfo::CallsEval() {
   return length() > 0 && CallsEvalField::decode(Flags());
 }
 
 
-bool ScopeInfo::IsStrictMode() {
-  return length() > 0 && StrictModeField::decode(Flags());
+LanguageMode ScopeInfo::language_mode() {
+  ASSERT(length() > 0);
+  return LanguageModeField::decode(Flags());
 }
 
 
 int ScopeInfo::LocalCount() {
   return StackLocalCount() + ContextLocalCount();
 }
 
 
 int ScopeInfo::StackSlotCount() {
   if (length() > 0) {
@@ skipping 321 matching lines @@
             Context::MIN_CONTEXT_SLOTS,
             ContextLocalNameEntriesIndex(),
             ContextLocalNameEntriesIndex() + ContextLocalCount(),
             this);
 
   PrintF("}\n");
 }
 #endif  // DEBUG
 
 } }  // namespace v8::internal