Introduce LanguageMode, drop StrictMode.

src/factory.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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/conversions.h"
 #include "src/isolate-inl.h"
@@ skipping 1240 matching lines @@
   InitializeFunction(result, info, context);
   return result;
 }
 
 
 Handle<JSFunction> Factory::NewFunction(Handle<Map> map,
                                         Handle<String> name,
                                         MaybeHandle<Code> code) {
   Handle<Context> context(isolate()->native_context());
   Handle<SharedFunctionInfo> info = NewSharedFunctionInfo(name, code);
-  DCHECK((info->strict_mode() == SLOPPY) &&
+  DCHECK(is_sloppy(info->language_mode()) &&
          (map.is_identical_to(isolate()->sloppy_function_map()) ||
           map.is_identical_to(
               isolate()->sloppy_function_without_prototype_map()) ||
           map.is_identical_to(
               isolate()->sloppy_function_with_readonly_prototype_map())));
   return NewFunction(map, info, context);
 }
 
 
 Handle<JSFunction> Factory::NewFunction(Handle<String> name) {
@@ skipping 90 matching lines @@
                                      Handle<SharedFunctionInfo> info) {
   return isolate->use_crankshaft() && !info->is_toplevel() &&
          info->is_compiled() && info->allows_lazy_compilation();
 }
 
 
 Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
     Handle<SharedFunctionInfo> info,
     Handle<Context> context,
     PretenureFlag pretenure) {
-  int map_index = Context::FunctionMapIndex(info->strict_mode(), info->kind());
+  int map_index =
+      Context::FunctionMapIndex(info->language_mode(), info->kind());
   Handle<Map> map(Map::cast(context->native_context()->get(map_index)));
   Handle<JSFunction> result = NewFunction(map, info, context, pretenure);
 
   if (info->ic_age() != isolate()->heap()->global_ic_age()) {
     info->ResetForNewContext(isolate()->heap()->global_ic_age());
   }
 
   int index = info->SearchOptimizedCodeMap(context->native_context(),
                                            BailoutId::None());
   if (!info->bound() && index < 0) {
@@ skipping 829 matching lines @@
 
   // Link debug info to function.
   shared->set_debug_info(*debug_info);
 
   return debug_info;
 }
 
 
 Handle<JSObject> Factory::NewArgumentsObject(Handle<JSFunction> callee,
                                              int length) {
-  bool strict_mode_callee = callee->shared()->strict_mode() == STRICT;
+  bool strict_mode_callee = is_strict(callee->shared()->language_mode());
   Handle<Map> map = strict_mode_callee ? isolate()->strict_arguments_map()
                                        : isolate()->sloppy_arguments_map();
 
   AllocationSiteUsageContext context(isolate(), Handle<AllocationSite>(),
                                      false);
   DCHECK(!isolate()->has_pending_exception());
   Handle<JSObject> result = NewJSObjectFromMap(map);
   Handle<Smi> value(Smi::FromInt(length), isolate());
   Object::SetProperty(result, length_string(), value, STRICT).Assert();
   if (!strict_mode_callee) {
@@ skipping 281 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal