Revert "Enable Object.observe by default"

src/bootstrapper.cc

 // Copyright 2012 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 1559 matching lines @@
   INSTALL_NATIVE(JSFunction, "ToUint32", to_uint32_fun);
   INSTALL_NATIVE(JSFunction, "ToInt32", to_int32_fun);
   INSTALL_NATIVE(JSFunction, "GlobalEval", global_eval_fun);
   INSTALL_NATIVE(JSFunction, "Instantiate", instantiate_fun);
   INSTALL_NATIVE(JSFunction, "ConfigureTemplateInstance",
                  configure_instance_fun);
   INSTALL_NATIVE(JSFunction, "GetStackTraceLine", get_stack_trace_line_fun);
   INSTALL_NATIVE(JSObject, "functionCache", function_cache);
   INSTALL_NATIVE(JSFunction, "ToCompletePropertyDescriptor",
                  to_complete_property_descriptor);
-  INSTALL_NATIVE(JSFunction, "NotifyChange", observers_notify_change);
-  INSTALL_NATIVE(JSFunction, "EnqueueSpliceRecord", observers_enqueue_splice);
-  INSTALL_NATIVE(JSFunction, "BeginPerformSplice",
-                 observers_begin_perform_splice);
-  INSTALL_NATIVE(JSFunction, "EndPerformSplice",
-                 observers_end_perform_splice);
 }
 
 
 void Genesis::InstallExperimentalNativeFunctions() {
   INSTALL_NATIVE(JSFunction, "RunMicrotasks", run_microtasks);
   INSTALL_NATIVE(JSFunction, "EnqueueExternalMicrotask",
                  enqueue_external_microtask);
 
   if (FLAG_harmony_proxies) {
     INSTALL_NATIVE(JSFunction, "DerivedHasTrap", derived_has_trap);
     INSTALL_NATIVE(JSFunction, "DerivedGetTrap", derived_get_trap);
     INSTALL_NATIVE(JSFunction, "DerivedSetTrap", derived_set_trap);
     INSTALL_NATIVE(JSFunction, "ProxyEnumerate", proxy_enumerate);
   }
+  if (FLAG_harmony_observation) {
+    INSTALL_NATIVE(JSFunction, "NotifyChange", observers_notify_change);
+    INSTALL_NATIVE(JSFunction, "EnqueueSpliceRecord", observers_enqueue_splice);
+    INSTALL_NATIVE(JSFunction, "BeginPerformSplice",
+                   observers_begin_perform_splice);
+    INSTALL_NATIVE(JSFunction, "EndPerformSplice",
+                   observers_end_perform_splice);
+  }
 }
 
 #undef INSTALL_NATIVE
 
 
 Handle<JSFunction> Genesis::InstallInternalArray(
     Handle<JSBuiltinsObject> builtins,
     const char* name,
     ElementsKind elements_kind) {
   // --- I n t e r n a l   A r r a y ---
@@ skipping 423 matching lines @@
   }
 
 
 bool Genesis::InstallExperimentalNatives() {
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount();
        i++) {
     INSTALL_EXPERIMENTAL_NATIVE(i, symbols, "symbol.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, proxies, "proxy.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, collections, "collection.js")
+    INSTALL_EXPERIMENTAL_NATIVE(i, observation, "object-observe.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, promises, "promise.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, generators, "generator.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, iteration, "array-iterator.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, strings, "harmony-string.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, arrays, "harmony-array.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, maths, "harmony-math.js")
   }
 
   InstallExperimentalNativeFunctions();
   InstallExperimentalBuiltinFunctionIds();
@@ skipping 681 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal