Remove more dead code after Object.observe removal

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/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 1097 matching lines @@
     native_context()->set_object_is_frozen(*object_is_frozen);
 
     Handle<JSFunction> object_is_sealed = SimpleInstallFunction(
         object_function, "isSealed", Builtins::kObjectIsSealed, 1, false);
     native_context()->set_object_is_sealed(*object_is_sealed);
 
     Handle<JSFunction> object_keys = SimpleInstallFunction(
         object_function, "keys", Builtins::kObjectKeys, 1, false);
     native_context()->set_object_keys(*object_keys);
 
+    SimpleInstallFunction(isolate->initial_object_prototype(),
+                          "__defineGetter__", Builtins::kObjectDefineGetter, 2,
+                          true);
+    SimpleInstallFunction(isolate->initial_object_prototype(),
+                          "__defineSetter__", Builtins::kObjectDefineSetter, 2,
+                          true);
     SimpleInstallFunction(isolate->initial_object_prototype(), "hasOwnProperty",
                           Builtins::kObjectHasOwnProperty, 1, true);
+    SimpleInstallFunction(isolate->initial_object_prototype(),
+                          "__lookupGetter__", Builtins::kObjectLookupGetter, 1,
+                          true);
+    SimpleInstallFunction(isolate->initial_object_prototype(),
+                          "__lookupSetter__", Builtins::kObjectLookupSetter, 1,
+                          true);
   }
 
   Handle<JSObject> global(native_context()->global_object());
 
   {  // --- F u n c t i o n ---
     Handle<JSFunction> prototype = empty_function;
     Handle<JSFunction> function_fun =
         InstallFunction(global, "Function", JS_FUNCTION_TYPE, JSFunction::kSize,
                         prototype, Builtins::kFunctionConstructor);
     function_fun->set_prototype_or_initial_map(
@@ skipping 2543 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8