Merge V8 at branches/3.2 r8200: Initial merge by Git

Change-Id: I5c434306e98132997e9c5f6024b6ce200b255edf
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 0800714..a30ffc0 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// 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:
@@ -141,8 +141,7 @@
 
 class Genesis BASE_EMBEDDED {
  public:
-  Genesis(Isolate* isolate,
-          Handle<Object> global_object,
+  Genesis(Handle<Object> global_object,
           v8::Handle<v8::ObjectTemplate> global_template,
           v8::ExtensionConfiguration* extensions);
   ~Genesis() { }
@@ -151,13 +150,8 @@
 
   Genesis* previous() { return previous_; }
 
-  Isolate* isolate() const { return isolate_; }
-  Factory* factory() const { return isolate_->factory(); }
-  Heap* heap() const { return isolate_->heap(); }
-
  private:
   Handle<Context> global_context_;
-  Isolate* isolate_;
 
   // There may be more than one active genesis object: When GC is
   // triggered during environment creation there may be weak handle
@@ -169,7 +163,7 @@
   // Creates some basic objects. Used for creating a context from scratch.
   void CreateRoots();
   // Creates the empty function.  Used for creating a context from scratch.
-  Handle<JSFunction> CreateEmptyFunction(Isolate* isolate);
+  Handle<JSFunction> CreateEmptyFunction();
   // Creates the ThrowTypeError function. ECMA 5th Ed. 13.2.3
   Handle<JSFunction> CreateThrowTypeErrorFunction(Builtins::Name builtin);
 
@@ -200,7 +194,6 @@
   // Used for creating a context from scratch.
   void InstallNativeFunctions();
   bool InstallNatives();
-  bool InstallExperimentalNatives();
   void InstallBuiltinFunctionIds();
   void InstallJSFunctionResultCaches();
   void InitializeNormalizedMapCaches();
@@ -246,8 +239,7 @@
       Handle<FixedArray> arguments,
       Handle<FixedArray> caller);
 
-  static bool CompileBuiltin(Isolate* isolate, int index);
-  static bool CompileExperimentalBuiltin(Isolate* isolate, int index);
+  static bool CompileBuiltin(int index);
   static bool CompileNative(Vector<const char> name, Handle<String> source);
   static bool CompileScriptCached(Vector<const char> name,
                                   Handle<String> source,
@@ -277,13 +269,12 @@
 
 
 Handle<Context> Bootstrapper::CreateEnvironment(
-    Isolate* isolate,
     Handle<Object> global_object,
     v8::Handle<v8::ObjectTemplate> global_template,
     v8::ExtensionConfiguration* extensions) {
   HandleScope scope;
   Handle<Context> env;
-  Genesis genesis(isolate, global_object, global_template, extensions);
+  Genesis genesis(global_object, global_template, extensions);
   env = genesis.result();
   if (!env.is_null()) {
     if (InstallExtensions(env, extensions)) {
@@ -296,16 +287,15 @@
 
 static void SetObjectPrototype(Handle<JSObject> object, Handle<Object> proto) {
   // object.__proto__ = proto;
-  Factory* factory = object->GetIsolate()->factory();
   Handle<Map> old_to_map = Handle<Map>(object->map());
-  Handle<Map> new_to_map = factory->CopyMapDropTransitions(old_to_map);
+  Handle<Map> new_to_map = FACTORY->CopyMapDropTransitions(old_to_map);
   new_to_map->set_prototype(*proto);
   object->set_map(*new_to_map);
 }
 
 
 void Bootstrapper::DetachGlobal(Handle<Context> env) {
-  Factory* factory = env->GetIsolate()->factory();
+  Factory* factory = Isolate::Current()->factory();
   JSGlobalProxy::cast(env->global_proxy())->set_context(*factory->null_value());
   SetObjectPrototype(Handle<JSObject>(env->global_proxy()),
                      factory->null_value());
@@ -332,7 +322,7 @@
                                           Handle<JSObject> prototype,
                                           Builtins::Name call,
                                           bool is_ecma_native) {
-  Isolate* isolate = target->GetIsolate();
+  Isolate* isolate = Isolate::Current();
   Factory* factory = isolate->factory();
   Handle<String> symbol = factory->LookupAsciiSymbol(name);
   Handle<Code> call_code = Handle<Code>(isolate->builtins()->builtin(call));
@@ -354,31 +344,30 @@
 
 Handle<DescriptorArray> Genesis::ComputeFunctionInstanceDescriptor(
     PrototypePropertyMode prototypeMode) {
+  Factory* factory = Isolate::Current()->factory();
   Handle<DescriptorArray> descriptors =
-      factory()->NewDescriptorArray(prototypeMode == DONT_ADD_PROTOTYPE
-                                    ? 4
-                                    : 5);
+      factory->NewDescriptorArray(prototypeMode == DONT_ADD_PROTOTYPE ? 4 : 5);
   PropertyAttributes attributes =
       static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   {  // Add length.
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionLength);
-    CallbacksDescriptor d(*factory()->length_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionLength);
+    CallbacksDescriptor d(*factory->length_symbol(), *proxy, attributes);
     descriptors->Set(0, &d);
   }
   {  // Add name.
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionName);
-    CallbacksDescriptor d(*factory()->name_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionName);
+    CallbacksDescriptor d(*factory->name_symbol(), *proxy, attributes);
     descriptors->Set(1, &d);
   }
   {  // Add arguments.
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionArguments);
-    CallbacksDescriptor d(*factory()->arguments_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionArguments);
+    CallbacksDescriptor d(*factory->arguments_symbol(), *proxy, attributes);
     descriptors->Set(2, &d);
   }
   {  // Add caller.
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionCaller);
-    CallbacksDescriptor d(*factory()->caller_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionCaller);
+    CallbacksDescriptor d(*factory->caller_symbol(), *proxy, attributes);
     descriptors->Set(3, &d);
   }
   if (prototypeMode != DONT_ADD_PROTOTYPE) {
@@ -386,8 +375,8 @@
     if (prototypeMode == ADD_WRITEABLE_PROTOTYPE) {
       attributes = static_cast<PropertyAttributes>(attributes & ~READ_ONLY);
     }
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionPrototype);
-    CallbacksDescriptor d(*factory()->prototype_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionPrototype);
+    CallbacksDescriptor d(*factory->prototype_symbol(), *proxy, attributes);
     descriptors->Set(4, &d);
   }
   descriptors->Sort();
@@ -396,7 +385,7 @@
 
 
 Handle<Map> Genesis::CreateFunctionMap(PrototypePropertyMode prototype_mode) {
-  Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
+  Handle<Map> map = FACTORY->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
   Handle<DescriptorArray> descriptors =
       ComputeFunctionInstanceDescriptor(prototype_mode);
   map->set_instance_descriptors(*descriptors);
@@ -405,7 +394,7 @@
 }
 
 
-Handle<JSFunction> Genesis::CreateEmptyFunction(Isolate* isolate) {
+Handle<JSFunction> Genesis::CreateEmptyFunction() {
   // Allocate the map for function instances. Maps are allocated first and their
   // prototypes patched later, once empty function is created.
 
@@ -433,6 +422,7 @@
   function_instance_map_writable_prototype_ =
       CreateFunctionMap(ADD_WRITEABLE_PROTOTYPE);
 
+  Isolate* isolate = Isolate::Current();
   Factory* factory = isolate->factory();
   Heap* heap = isolate->heap();
 
@@ -501,31 +491,28 @@
     PrototypePropertyMode prototypeMode,
     Handle<FixedArray> arguments,
     Handle<FixedArray> caller) {
+  Factory* factory = Isolate::Current()->factory();
   Handle<DescriptorArray> descriptors =
-      factory()->NewDescriptorArray(prototypeMode == DONT_ADD_PROTOTYPE
-                                    ? 4
-                                    : 5);
+      factory->NewDescriptorArray(prototypeMode == DONT_ADD_PROTOTYPE ? 4 : 5);
   PropertyAttributes attributes = static_cast<PropertyAttributes>(
       DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   {  // length
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionLength);
-    CallbacksDescriptor d(*factory()->length_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionLength);
+    CallbacksDescriptor d(*factory->length_symbol(), *proxy, attributes);
     descriptors->Set(0, &d);
   }
   {  // name
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionName);
-    CallbacksDescriptor d(*factory()->name_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionName);
+    CallbacksDescriptor d(*factory->name_symbol(), *proxy, attributes);
     descriptors->Set(1, &d);
   }
   {  // arguments
-    CallbacksDescriptor d(*factory()->arguments_symbol(),
-                          *arguments,
-                          attributes);
+    CallbacksDescriptor d(*factory->arguments_symbol(), *arguments, attributes);
     descriptors->Set(2, &d);
   }
   {  // caller
-    CallbacksDescriptor d(*factory()->caller_symbol(), *caller, attributes);
+    CallbacksDescriptor d(*factory->caller_symbol(), *caller, attributes);
     descriptors->Set(3, &d);
   }
 
@@ -534,8 +521,8 @@
     if (prototypeMode == ADD_WRITEABLE_PROTOTYPE) {
       attributes = static_cast<PropertyAttributes>(attributes & ~READ_ONLY);
     }
-    Handle<Proxy> proxy = factory()->NewProxy(&Accessors::FunctionPrototype);
-    CallbacksDescriptor d(*factory()->prototype_symbol(), *proxy, attributes);
+    Handle<Proxy> proxy = factory->NewProxy(&Accessors::FunctionPrototype);
+    CallbacksDescriptor d(*factory->prototype_symbol(), *proxy, attributes);
     descriptors->Set(4, &d);
   }
 
@@ -547,11 +534,14 @@
 // ECMAScript 5th Edition, 13.2.3
 Handle<JSFunction> Genesis::CreateThrowTypeErrorFunction(
     Builtins::Name builtin) {
-  Handle<String> name = factory()->LookupAsciiSymbol("ThrowTypeError");
+  Isolate* isolate = Isolate::Current();
+  Factory* factory = isolate->factory();
+
+  Handle<String> name = factory->LookupAsciiSymbol("ThrowTypeError");
   Handle<JSFunction> throw_type_error =
-      factory()->NewFunctionWithoutPrototype(name, kStrictMode);
+      factory->NewFunctionWithoutPrototype(name, kStrictMode);
   Handle<Code> code = Handle<Code>(
-      isolate()->builtins()->builtin(builtin));
+      isolate->builtins()->builtin(builtin));
 
   throw_type_error->set_map(global_context()->strict_mode_function_map());
   throw_type_error->set_code(*code);
@@ -569,7 +559,7 @@
     Handle<JSFunction> empty_function,
     Handle<FixedArray> arguments_callbacks,
     Handle<FixedArray> caller_callbacks) {
-  Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
+  Handle<Map> map = FACTORY->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
   Handle<DescriptorArray> descriptors =
       ComputeStrictFunctionInstanceDescriptor(prototype_mode,
                                               arguments_callbacks,
@@ -584,7 +574,7 @@
 void Genesis::CreateStrictModeFunctionMaps(Handle<JSFunction> empty) {
   // Create the callbacks arrays for ThrowTypeError functions.
   // The get/set callacks are filled in after the maps are created below.
-  Factory* factory = empty->GetIsolate()->factory();
+  Factory* factory = Isolate::Current()->factory();
   Handle<FixedArray> arguments = factory->NewFixedArray(2, TENURED);
   Handle<FixedArray> caller = factory->NewFixedArray(2, TENURED);
 
@@ -633,7 +623,7 @@
 
 static void AddToWeakGlobalContextList(Context* context) {
   ASSERT(context->IsGlobalContext());
-  Heap* heap = context->GetIsolate()->heap();
+  Heap* heap = Isolate::Current()->heap();
 #ifdef DEBUG
   { // NOLINT
     ASSERT(context->get(Context::NEXT_CONTEXT_LINK)->IsUndefined());
@@ -651,14 +641,15 @@
 
 
 void Genesis::CreateRoots() {
+  Isolate* isolate = Isolate::Current();
   // Allocate the global context FixedArray first and then patch the
   // closure and extension object later (we need the empty function
   // and the global object, but in order to create those, we need the
   // global context).
-  global_context_ = Handle<Context>::cast(isolate()->global_handles()->Create(
-              *factory()->NewGlobalContext()));
+  global_context_ = Handle<Context>::cast(isolate->global_handles()->Create(
+              *isolate->factory()->NewGlobalContext()));
   AddToWeakGlobalContextList(*global_context_);
-  isolate()->set_context(*global_context());
+  isolate->set_context(*global_context());
 
   // Allocate the message listeners object.
   {
@@ -701,13 +692,17 @@
     }
   }
 
+  Isolate* isolate = Isolate::Current();
+  Factory* factory = isolate->factory();
+  Heap* heap = isolate->heap();
+
   if (js_global_template.is_null()) {
-    Handle<String> name = Handle<String>(heap()->empty_symbol());
-    Handle<Code> code = Handle<Code>(isolate()->builtins()->builtin(
+    Handle<String> name = Handle<String>(heap->empty_symbol());
+    Handle<Code> code = Handle<Code>(isolate->builtins()->builtin(
         Builtins::kIllegal));
     js_global_function =
-        factory()->NewFunction(name, JS_GLOBAL_OBJECT_TYPE,
-                               JSGlobalObject::kSize, code, true);
+        factory->NewFunction(name, JS_GLOBAL_OBJECT_TYPE,
+                             JSGlobalObject::kSize, code, true);
     // Change the constructor property of the prototype of the
     // hidden global function to refer to the Object function.
     Handle<JSObject> prototype =
@@ -715,20 +710,20 @@
             JSObject::cast(js_global_function->instance_prototype()));
     SetLocalPropertyNoThrow(
         prototype,
-        factory()->constructor_symbol(),
-        isolate()->object_function(),
+        factory->constructor_symbol(),
+        isolate->object_function(),
         NONE);
   } else {
     Handle<FunctionTemplateInfo> js_global_constructor(
         FunctionTemplateInfo::cast(js_global_template->constructor()));
     js_global_function =
-        factory()->CreateApiFunction(js_global_constructor,
-                                     factory()->InnerGlobalObject);
+        factory->CreateApiFunction(js_global_constructor,
+                                   factory->InnerGlobalObject);
   }
 
   js_global_function->initial_map()->set_is_hidden_prototype();
   Handle<GlobalObject> inner_global =
-      factory()->NewGlobalObject(js_global_function);
+      factory->NewGlobalObject(js_global_function);
   if (inner_global_out != NULL) {
     *inner_global_out = inner_global;
   }
@@ -736,23 +731,23 @@
   // Step 2: create or re-initialize the global proxy object.
   Handle<JSFunction> global_proxy_function;
   if (global_template.IsEmpty()) {
-    Handle<String> name = Handle<String>(heap()->empty_symbol());
-    Handle<Code> code = Handle<Code>(isolate()->builtins()->builtin(
+    Handle<String> name = Handle<String>(heap->empty_symbol());
+    Handle<Code> code = Handle<Code>(isolate->builtins()->builtin(
         Builtins::kIllegal));
     global_proxy_function =
-        factory()->NewFunction(name, JS_GLOBAL_PROXY_TYPE,
-                               JSGlobalProxy::kSize, code, true);
+        factory->NewFunction(name, JS_GLOBAL_PROXY_TYPE,
+                             JSGlobalProxy::kSize, code, true);
   } else {
     Handle<ObjectTemplateInfo> data =
         v8::Utils::OpenHandle(*global_template);
     Handle<FunctionTemplateInfo> global_constructor(
             FunctionTemplateInfo::cast(data->constructor()));
     global_proxy_function =
-        factory()->CreateApiFunction(global_constructor,
-                                     factory()->OuterGlobalObject);
+        factory->CreateApiFunction(global_constructor,
+                                   factory->OuterGlobalObject);
   }
 
-  Handle<String> global_name = factory()->LookupAsciiSymbol("global");
+  Handle<String> global_name = factory->LookupAsciiSymbol("global");
   global_proxy_function->shared()->set_instance_class_name(*global_name);
   global_proxy_function->initial_map()->set_is_access_check_needed(true);
 
@@ -766,7 +761,7 @@
         Handle<JSGlobalProxy>::cast(global_object));
   } else {
     return Handle<JSGlobalProxy>::cast(
-        factory()->NewJSObject(global_proxy_function, TENURED));
+        factory->NewJSObject(global_proxy_function, TENURED));
   }
 }
 
@@ -791,7 +786,7 @@
   static const PropertyAttributes attributes =
       static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
   ForceSetProperty(builtins_global,
-                   factory()->LookupAsciiSymbol("global"),
+                   FACTORY->LookupAsciiSymbol("global"),
                    inner_global,
                    attributes);
   // Setup the reference from the global object to the builtins object.
@@ -819,7 +814,7 @@
   // object reinitialization.
   global_context()->set_security_token(*inner_global);
 
-  Isolate* isolate = inner_global->GetIsolate();
+  Isolate* isolate = Isolate::Current();
   Factory* factory = isolate->factory();
   Heap* heap = isolate->heap();
 
@@ -1169,26 +1164,17 @@
 }
 
 
-bool Genesis::CompileBuiltin(Isolate* isolate, int index) {
+bool Genesis::CompileBuiltin(int index) {
   Vector<const char> name = Natives::GetScriptName(index);
   Handle<String> source_code =
-      isolate->bootstrapper()->NativesSourceLookup(index);
-  return CompileNative(name, source_code);
-}
-
-
-bool Genesis::CompileExperimentalBuiltin(Isolate* isolate, int index) {
-  Vector<const char> name = ExperimentalNatives::GetScriptName(index);
-  Factory* factory = isolate->factory();
-  Handle<String> source_code =
-      factory->NewStringFromAscii(ExperimentalNatives::GetScriptSource(index));
+      Isolate::Current()->bootstrapper()->NativesSourceLookup(index);
   return CompileNative(name, source_code);
 }
 
 
 bool Genesis::CompileNative(Vector<const char> name, Handle<String> source) {
   HandleScope scope;
-  Isolate* isolate = source->GetIsolate();
+  Isolate* isolate = Isolate::Current();
 #ifdef ENABLE_DEBUGGER_SUPPORT
   isolate->debugger()->set_compiling_natives(true);
 #endif
@@ -1213,7 +1199,7 @@
                                   v8::Extension* extension,
                                   Handle<Context> top_context,
                                   bool use_runtime_context) {
-  Factory* factory = source->GetIsolate()->factory();
+  Factory* factory = Isolate::Current()->factory();
   HandleScope scope;
   Handle<SharedFunctionInfo> function_info;
 
@@ -1260,15 +1246,15 @@
 }
 
 
-#define INSTALL_NATIVE(Type, name, var)                                       \
-  Handle<String> var##_name = factory()->LookupAsciiSymbol(name);             \
-  Object* var##_native =                                                      \
-      global_context()->builtins()->GetPropertyNoExceptionThrown(             \
-           *var##_name);                                                      \
+#define INSTALL_NATIVE(Type, name, var)                                        \
+  Handle<String> var##_name = factory->LookupAsciiSymbol(name);                \
+  Object* var##_native =                                                       \
+      global_context()->builtins()->GetPropertyNoExceptionThrown(*var##_name); \
   global_context()->set_##var(Type::cast(var##_native));
 
 
 void Genesis::InstallNativeFunctions() {
+  Factory* factory = Isolate::Current()->factory();
   HandleScope scope;
   INSTALL_NATIVE(JSFunction, "CreateDate", create_date_fun);
   INSTALL_NATIVE(JSFunction, "ToNumber", to_number_fun);
@@ -1291,23 +1277,25 @@
 
 bool Genesis::InstallNatives() {
   HandleScope scope;
+  Isolate* isolate = Isolate::Current();
+  Factory* factory = isolate->factory();
+  Heap* heap = isolate->heap();
 
   // Create a function for the builtins object. Allocate space for the
   // JavaScript builtins, a reference to the builtins object
   // (itself) and a reference to the global_context directly in the object.
   Handle<Code> code = Handle<Code>(
-      isolate()->builtins()->builtin(Builtins::kIllegal));
+      isolate->builtins()->builtin(Builtins::kIllegal));
   Handle<JSFunction> builtins_fun =
-      factory()->NewFunction(factory()->empty_symbol(),
-                             JS_BUILTINS_OBJECT_TYPE,
-                             JSBuiltinsObject::kSize, code, true);
+      factory->NewFunction(factory->empty_symbol(), JS_BUILTINS_OBJECT_TYPE,
+                           JSBuiltinsObject::kSize, code, true);
 
-  Handle<String> name = factory()->LookupAsciiSymbol("builtins");
+  Handle<String> name = factory->LookupAsciiSymbol("builtins");
   builtins_fun->shared()->set_instance_class_name(*name);
 
   // Allocate the builtins object.
   Handle<JSBuiltinsObject> builtins =
-      Handle<JSBuiltinsObject>::cast(factory()->NewGlobalObject(builtins_fun));
+      Handle<JSBuiltinsObject>::cast(factory->NewGlobalObject(builtins_fun));
   builtins->set_builtins(*builtins);
   builtins->set_global_context(*global_context());
   builtins->set_global_receiver(*builtins);
@@ -1318,7 +1306,7 @@
   // global object.
   static const PropertyAttributes attributes =
       static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
-  Handle<String> global_symbol = factory()->LookupAsciiSymbol("global");
+  Handle<String> global_symbol = factory->LookupAsciiSymbol("global");
   Handle<Object> global_obj(global_context()->global());
   SetLocalPropertyNoThrow(builtins, global_symbol, global_obj, attributes);
 
@@ -1327,13 +1315,12 @@
 
   // Create a bridge function that has context in the global context.
   Handle<JSFunction> bridge =
-      factory()->NewFunction(factory()->empty_symbol(),
-                             factory()->undefined_value());
-  ASSERT(bridge->context() == *isolate()->global_context());
+      factory->NewFunction(factory->empty_symbol(), factory->undefined_value());
+  ASSERT(bridge->context() == *isolate->global_context());
 
   // Allocate the builtins context.
   Handle<Context> context =
-    factory()->NewFunctionContext(Context::MIN_CONTEXT_SLOTS, bridge);
+    factory->NewFunctionContext(Context::MIN_CONTEXT_SLOTS, bridge);
   context->set_global(*builtins);  // override builtins global object
 
   global_context()->set_runtime_context(*context);
@@ -1342,113 +1329,113 @@
     // Builtin functions for Script.
     Handle<JSFunction> script_fun =
         InstallFunction(builtins, "Script", JS_VALUE_TYPE, JSValue::kSize,
-                        isolate()->initial_object_prototype(),
+                        isolate->initial_object_prototype(),
                         Builtins::kIllegal, false);
     Handle<JSObject> prototype =
-        factory()->NewJSObject(isolate()->object_function(), TENURED);
+        factory->NewJSObject(isolate->object_function(), TENURED);
     SetPrototype(script_fun, prototype);
     global_context()->set_script_function(*script_fun);
 
     // Add 'source' and 'data' property to scripts.
     PropertyAttributes common_attributes =
         static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
-    Handle<Proxy> proxy_source = factory()->NewProxy(&Accessors::ScriptSource);
+    Handle<Proxy> proxy_source = factory->NewProxy(&Accessors::ScriptSource);
     Handle<DescriptorArray> script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
-            factory()->empty_descriptor_array(),
-            factory()->LookupAsciiSymbol("source"),
+        factory->CopyAppendProxyDescriptor(
+            factory->empty_descriptor_array(),
+            factory->LookupAsciiSymbol("source"),
             proxy_source,
             common_attributes);
-    Handle<Proxy> proxy_name = factory()->NewProxy(&Accessors::ScriptName);
+    Handle<Proxy> proxy_name = factory->NewProxy(&Accessors::ScriptName);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("name"),
+            factory->LookupAsciiSymbol("name"),
             proxy_name,
             common_attributes);
-    Handle<Proxy> proxy_id = factory()->NewProxy(&Accessors::ScriptId);
+    Handle<Proxy> proxy_id = factory->NewProxy(&Accessors::ScriptId);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("id"),
+            factory->LookupAsciiSymbol("id"),
             proxy_id,
             common_attributes);
     Handle<Proxy> proxy_line_offset =
-        factory()->NewProxy(&Accessors::ScriptLineOffset);
+        factory->NewProxy(&Accessors::ScriptLineOffset);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("line_offset"),
+            factory->LookupAsciiSymbol("line_offset"),
             proxy_line_offset,
             common_attributes);
     Handle<Proxy> proxy_column_offset =
-        factory()->NewProxy(&Accessors::ScriptColumnOffset);
+        factory->NewProxy(&Accessors::ScriptColumnOffset);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("column_offset"),
+            factory->LookupAsciiSymbol("column_offset"),
             proxy_column_offset,
             common_attributes);
-    Handle<Proxy> proxy_data = factory()->NewProxy(&Accessors::ScriptData);
+    Handle<Proxy> proxy_data = factory->NewProxy(&Accessors::ScriptData);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("data"),
+            factory->LookupAsciiSymbol("data"),
             proxy_data,
             common_attributes);
-    Handle<Proxy> proxy_type = factory()->NewProxy(&Accessors::ScriptType);
+    Handle<Proxy> proxy_type = factory->NewProxy(&Accessors::ScriptType);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("type"),
+            factory->LookupAsciiSymbol("type"),
             proxy_type,
             common_attributes);
     Handle<Proxy> proxy_compilation_type =
-        factory()->NewProxy(&Accessors::ScriptCompilationType);
+        factory->NewProxy(&Accessors::ScriptCompilationType);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("compilation_type"),
+            factory->LookupAsciiSymbol("compilation_type"),
             proxy_compilation_type,
             common_attributes);
     Handle<Proxy> proxy_line_ends =
-        factory()->NewProxy(&Accessors::ScriptLineEnds);
+        factory->NewProxy(&Accessors::ScriptLineEnds);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("line_ends"),
+            factory->LookupAsciiSymbol("line_ends"),
             proxy_line_ends,
             common_attributes);
     Handle<Proxy> proxy_context_data =
-        factory()->NewProxy(&Accessors::ScriptContextData);
+        factory->NewProxy(&Accessors::ScriptContextData);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("context_data"),
+            factory->LookupAsciiSymbol("context_data"),
             proxy_context_data,
             common_attributes);
     Handle<Proxy> proxy_eval_from_script =
-        factory()->NewProxy(&Accessors::ScriptEvalFromScript);
+        factory->NewProxy(&Accessors::ScriptEvalFromScript);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("eval_from_script"),
+            factory->LookupAsciiSymbol("eval_from_script"),
             proxy_eval_from_script,
             common_attributes);
     Handle<Proxy> proxy_eval_from_script_position =
-        factory()->NewProxy(&Accessors::ScriptEvalFromScriptPosition);
+        factory->NewProxy(&Accessors::ScriptEvalFromScriptPosition);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("eval_from_script_position"),
+            factory->LookupAsciiSymbol("eval_from_script_position"),
             proxy_eval_from_script_position,
             common_attributes);
     Handle<Proxy> proxy_eval_from_function_name =
-        factory()->NewProxy(&Accessors::ScriptEvalFromFunctionName);
+        factory->NewProxy(&Accessors::ScriptEvalFromFunctionName);
     script_descriptors =
-        factory()->CopyAppendProxyDescriptor(
+        factory->CopyAppendProxyDescriptor(
             script_descriptors,
-            factory()->LookupAsciiSymbol("eval_from_function_name"),
+            factory->LookupAsciiSymbol("eval_from_function_name"),
             proxy_eval_from_function_name,
             common_attributes);
 
@@ -1456,9 +1443,9 @@
     script_map->set_instance_descriptors(*script_descriptors);
 
     // Allocate the empty script.
-    Handle<Script> script = factory()->NewScript(factory()->empty_string());
+    Handle<Script> script = factory->NewScript(factory->empty_string());
     script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
-    heap()->public_set_empty_script(*script);
+    heap->public_set_empty_script(*script);
   }
   {
     // Builtin function for OpaqueReference -- a JSValue-based object,
@@ -1467,10 +1454,10 @@
     Handle<JSFunction> opaque_reference_fun =
         InstallFunction(builtins, "OpaqueReference", JS_VALUE_TYPE,
                         JSValue::kSize,
-                        isolate()->initial_object_prototype(),
+                        isolate->initial_object_prototype(),
                         Builtins::kIllegal, false);
     Handle<JSObject> prototype =
-        factory()->NewJSObject(isolate()->object_function(), TENURED);
+        factory->NewJSObject(isolate->object_function(), TENURED);
     SetPrototype(opaque_reference_fun, prototype);
     global_context()->set_opaque_reference_function(*opaque_reference_fun);
   }
@@ -1489,23 +1476,23 @@
                         "InternalArray",
                         JS_ARRAY_TYPE,
                         JSArray::kSize,
-                        isolate()->initial_object_prototype(),
+                        isolate->initial_object_prototype(),
                         Builtins::kArrayCode,
                         true);
     Handle<JSObject> prototype =
-        factory()->NewJSObject(isolate()->object_function(), TENURED);
+        factory->NewJSObject(isolate->object_function(), TENURED);
     SetPrototype(array_function, prototype);
 
     array_function->shared()->set_construct_stub(
-        isolate()->builtins()->builtin(Builtins::kArrayConstructCode));
+        isolate->builtins()->builtin(Builtins::kArrayConstructCode));
     array_function->shared()->DontAdaptArguments();
 
     // Make "length" magic on instances.
     Handle<DescriptorArray> array_descriptors =
-        factory()->CopyAppendProxyDescriptor(
-            factory()->empty_descriptor_array(),
-            factory()->length_symbol(),
-            factory()->NewProxy(&Accessors::ArrayLength),
+        factory->CopyAppendProxyDescriptor(
+            factory->empty_descriptor_array(),
+            factory->length_symbol(),
+            factory->NewProxy(&Accessors::ArrayLength),
             static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE));
 
     array_function->initial_map()->set_instance_descriptors(
@@ -1521,7 +1508,8 @@
   for (int i = Natives::GetDebuggerCount();
        i < Natives::GetBuiltinsCount();
        i++) {
-    if (!CompileBuiltin(isolate(), i)) return false;
+    Vector<const char> name = Natives::GetScriptName(i);
+    if (!CompileBuiltin(i)) return false;
     // TODO(ager): We really only need to install the JS builtin
     // functions on the builtins object after compiling and running
     // runtime.js.
@@ -1541,9 +1529,9 @@
   InstallBuiltinFunctionIds();
 
   // Install Function.prototype.call and apply.
-  { Handle<String> key = factory()->function_class_symbol();
+  { Handle<String> key = factory->function_class_symbol();
     Handle<JSFunction> function =
-        Handle<JSFunction>::cast(GetProperty(isolate()->global(), key));
+        Handle<JSFunction>::cast(GetProperty(isolate->global(), key));
     Handle<JSObject> proto =
         Handle<JSObject>(JSObject::cast(function->instance_prototype()));
 
@@ -1585,7 +1573,7 @@
 
     // Add initial map.
     Handle<Map> initial_map =
-        factory()->NewMap(JS_ARRAY_TYPE, JSRegExpResult::kSize);
+        factory->NewMap(JS_ARRAY_TYPE, JSRegExpResult::kSize);
     initial_map->set_constructor(*array_constructor);
 
     // Set prototype on map.
@@ -1599,13 +1587,13 @@
     ASSERT_EQ(1, array_descriptors->number_of_descriptors());
 
     Handle<DescriptorArray> reresult_descriptors =
-        factory()->NewDescriptorArray(3);
+        factory->NewDescriptorArray(3);
 
     reresult_descriptors->CopyFrom(0, *array_descriptors, 0);
 
     int enum_index = 0;
     {
-      FieldDescriptor index_field(heap()->index_symbol(),
+      FieldDescriptor index_field(heap->index_symbol(),
                                   JSRegExpResult::kIndexIndex,
                                   NONE,
                                   enum_index++);
@@ -1613,7 +1601,7 @@
     }
 
     {
-      FieldDescriptor input_field(heap()->input_symbol(),
+      FieldDescriptor input_field(heap->input_symbol(),
                                   JSRegExpResult::kInputIndex,
                                   NONE,
                                   enum_index++);
@@ -1638,22 +1626,10 @@
 }
 
 
-bool Genesis::InstallExperimentalNatives() {
-  if (FLAG_harmony_proxies) {
-    for (int i = ExperimentalNatives::GetDebuggerCount();
-         i < ExperimentalNatives::GetBuiltinsCount();
-         i++) {
-      if (!CompileExperimentalBuiltin(isolate(), i)) return false;
-    }
-  }
-  return true;
-}
-
-
 static Handle<JSObject> ResolveBuiltinIdHolder(
     Handle<Context> global_context,
     const char* holder_expr) {
-  Factory* factory = global_context->GetIsolate()->factory();
+  Factory* factory = Isolate::Current()->factory();
   Handle<GlobalObject> global(global_context->global());
   const char* period_pos = strchr(holder_expr, '.');
   if (period_pos == NULL) {
@@ -1672,8 +1648,7 @@
 static void InstallBuiltinFunctionId(Handle<JSObject> holder,
                                      const char* function_name,
                                      BuiltinFunctionId id) {
-  Factory* factory = holder->GetIsolate()->factory();
-  Handle<String> name = factory->LookupAsciiSymbol(function_name);
+  Handle<String> name = FACTORY->LookupAsciiSymbol(function_name);
   Object* function_object = holder->GetProperty(*name)->ToObjectUnchecked();
   Handle<JSFunction> function(JSFunction::cast(function_object));
   function->shared()->set_function_data(Smi::FromInt(id));
@@ -1700,14 +1675,13 @@
   F(16, global_context()->regexp_function())
 
 
-static FixedArray* CreateCache(int size, JSFunction* factory_function) {
-  Factory* factory = factory_function->GetIsolate()->factory();
+static FixedArray* CreateCache(int size, JSFunction* factory) {
   // Caches are supposed to live for a long time, allocate in old space.
   int array_size = JSFunctionResultCache::kEntriesIndex + 2 * size;
   // Cannot use cast as object is not fully initialized yet.
   JSFunctionResultCache* cache = reinterpret_cast<JSFunctionResultCache*>(
-      *factory->NewFixedArrayWithHoles(array_size, TENURED));
-  cache->set(JSFunctionResultCache::kFactoryIndex, factory_function);
+      *FACTORY->NewFixedArrayWithHoles(array_size, TENURED));
+  cache->set(JSFunctionResultCache::kFactoryIndex, factory);
   cache->MakeZeroSize();
   return cache;
 }
@@ -1746,7 +1720,7 @@
 
 bool Bootstrapper::InstallExtensions(Handle<Context> global_context,
                                      v8::ExtensionConfiguration* extensions) {
-  Isolate* isolate = global_context->GetIsolate();
+  Isolate* isolate = Isolate::Current();
   BootstrapperActive active;
   SaveContext saved_context(isolate);
   isolate->set_context(*global_context);
@@ -1757,7 +1731,7 @@
 
 
 void Genesis::InstallSpecialObjects(Handle<Context> global_context) {
-  Factory* factory = global_context->GetIsolate()->factory();
+  Factory* factory = Isolate::Current()->factory();
   HandleScope scope;
   Handle<JSGlobalObject> js_global(
       JSGlobalObject::cast(global_context->global()));
@@ -1893,10 +1867,9 @@
 
 bool Genesis::InstallJSBuiltins(Handle<JSBuiltinsObject> builtins) {
   HandleScope scope;
-  Factory* factory = builtins->GetIsolate()->factory();
   for (int i = 0; i < Builtins::NumberOfJavaScriptBuiltins(); i++) {
     Builtins::JavaScript id = static_cast<Builtins::JavaScript>(i);
-    Handle<String> name = factory->LookupAsciiSymbol(Builtins::GetName(id));
+    Handle<String> name = FACTORY->LookupAsciiSymbol(Builtins::GetName(id));
     Object* function_object = builtins->GetPropertyNoExceptionThrown(*name);
     Handle<JSFunction> function
         = Handle<JSFunction>(JSFunction::cast(function_object));
@@ -1945,12 +1918,13 @@
   ASSERT(object->IsInstanceOf(
       FunctionTemplateInfo::cast(object_template->constructor())));
 
+  Isolate* isolate = Isolate::Current();
   bool pending_exception = false;
   Handle<JSObject> obj =
       Execution::InstantiateObject(object_template, &pending_exception);
   if (pending_exception) {
-    ASSERT(isolate()->has_pending_exception());
-    isolate()->clear_pending_exception();
+    ASSERT(isolate->has_pending_exception());
+    isolate->clear_pending_exception();
     return false;
   }
   TransferObject(obj, object);
@@ -2049,7 +2023,6 @@
 
 void Genesis::TransferObject(Handle<JSObject> from, Handle<JSObject> to) {
   HandleScope outer;
-  Factory* factory = from->GetIsolate()->factory();
 
   ASSERT(!from->IsJSArray());
   ASSERT(!to->IsJSArray());
@@ -2059,7 +2032,7 @@
 
   // Transfer the prototype (new map is needed).
   Handle<Map> old_to_map = Handle<Map>(to->map());
-  Handle<Map> new_to_map = factory->CopyMapDropTransitions(old_to_map);
+  Handle<Map> new_to_map = FACTORY->CopyMapDropTransitions(old_to_map);
   new_to_map->set_prototype(from->map()->prototype());
   to->set_map(*new_to_map);
 }
@@ -2080,10 +2053,10 @@
 }
 
 
-Genesis::Genesis(Isolate* isolate,
-                 Handle<Object> global_object,
+Genesis::Genesis(Handle<Object> global_object,
                  v8::Handle<v8::ObjectTemplate> global_template,
-                 v8::ExtensionConfiguration* extensions) : isolate_(isolate) {
+                 v8::ExtensionConfiguration* extensions) {
+  Isolate* isolate = Isolate::Current();
   result_ = Handle<Context>::null();
   // If V8 isn't running and cannot be initialized, just return.
   if (!V8::IsRunning() && !V8::Initialize(NULL)) return;
@@ -2113,7 +2086,7 @@
   } else {
     // We get here if there was no context snapshot.
     CreateRoots();
-    Handle<JSFunction> empty_function = CreateEmptyFunction(isolate);
+    Handle<JSFunction> empty_function = CreateEmptyFunction();
     CreateStrictModeFunctionMaps(empty_function);
     Handle<GlobalObject> inner_global;
     Handle<JSGlobalProxy> global_proxy =
@@ -2130,9 +2103,6 @@
     isolate->counters()->contexts_created_from_scratch()->Increment();
   }
 
-  // Install experimental natives.
-  if (!InstallExperimentalNatives()) return;
-
   result_ = global_context_;
 }