[heap] Limit friendship of the Heap class to essentials.

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/code-stubs.h"
@@ skipping 326 matching lines @@
 
 bool Bootstrapper::CreateCodeStubContext(Isolate* isolate) {
   HandleScope scope(isolate);
   SaveContext save_context(isolate);
   BootstrapperActive active(this);
 
   v8::ExtensionConfiguration no_extensions;
   Handle<Context> native_context = CreateEnvironment(
       MaybeHandle<JSGlobalProxy>(), v8::Local<v8::ObjectTemplate>(),
       &no_extensions, THIN_CONTEXT);
-  isolate->heap()->set_code_stub_context(*native_context);
+  isolate->heap()->SetRootCodeStubContext(*native_context);
   isolate->set_context(*native_context);
   Handle<JSObject> code_stub_exports =
       isolate->factory()->NewJSObject(isolate->object_function());
   JSObject::NormalizeProperties(code_stub_exports, CLEAR_INOBJECT_PROPERTIES, 2,
                                 "container to export to extra natives");
-  isolate->heap()->set_code_stub_exports_object(*code_stub_exports);
+  isolate->heap()->SetRootCodeStubExportsObject(*code_stub_exports);
   return InstallCodeStubNatives(isolate);
 }
 
 
 static void SetObjectPrototype(Handle<JSObject> object, Handle<Object> proto) {
   // object.__proto__ = proto;
   Handle<Map> old_map = Handle<Map>(object->map());
   Handle<Map> new_map = Map::Copy(old_map, "SetObjectPrototype");
   Map::SetPrototype(new_map, proto, FAST_PROTOTYPE);
   JSObject::MigrateToMap(object, new_map);
@@ skipping 1802 matching lines @@
     }
 
     Handle<AccessorInfo> script_is_embedder_debug_script =
         Accessors::ScriptIsEmbedderDebugScriptInfo(isolate(), attribs);
     {
       AccessorConstantDescriptor d(
           Handle<Name>(Name::cast(script_is_embedder_debug_script->name())),
           script_is_embedder_debug_script, attribs);
       script_map->AppendDescriptor(&d);
     }
-
-    // Allocate the empty script.
-    Handle<Script> script = factory()->NewScript(factory()->empty_string());
-    script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
-    heap()->public_set_empty_script(*script);
   }
   {
     // Builtin function for OpaqueReference -- a JSValue-based object,
     // that keeps its field isolated from JavaScript code. It may store
     // objects, that JavaScript code may not access.
     Handle<JSFunction> opaque_reference_fun = InstallFunction(
         builtins, "OpaqueReference", JS_VALUE_TYPE, JSValue::kSize,
         isolate()->initial_object_prototype(), Builtins::kIllegal);
     Handle<JSObject> prototype =
         factory()->NewJSObject(isolate()->object_function(), TENURED);
@@ skipping 990 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8