Make Failure inherit from MaybeObject instead of Object.

src/bootstrapper.cc

 // 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:
 //
 //     * 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 991 matching lines @@
                      ? top_context->builtins()
                      : top_context->global());
   bool has_pending_exception;
   Handle<Object> result =
       Execution::Call(fun, receiver, 0, NULL, &has_pending_exception);
   if (has_pending_exception) return false;
   return true;
 }
 
 
-#define INSTALL_NATIVE(Type, name, var)                                  \
-  Handle<String> var##_name = Factory::LookupAsciiSymbol(name);          \
-  global_context()->set_##var(Type::cast(global_context()->              \
-                                           builtins()->                  \
-                                             GetProperty(*var##_name)));
+#define INSTALL_NATIVE(Type, name, var)                                     \
+  Handle<String> var##_name = Factory::LookupAsciiSymbol(name);             \
+  global_context()->set_##var(Type::cast(                                   \
+      global_context()->builtins()->GetPropertyNoExceptionThrown(*var##_name)));
 
 void Genesis::InstallNativeFunctions() {
   HandleScope scope;
   INSTALL_NATIVE(JSFunction, "CreateDate", create_date_fun);
   INSTALL_NATIVE(JSFunction, "ToNumber", to_number_fun);
   INSTALL_NATIVE(JSFunction, "ToString", to_string_fun);
   INSTALL_NATIVE(JSFunction, "ToDetailString", to_detail_string_fun);
   INSTALL_NATIVE(JSFunction, "ToObject", to_object_fun);
   INSTALL_NATIVE(JSFunction, "ToInteger", to_integer_fun);
   INSTALL_NATIVE(JSFunction, "ToUint32", to_uint32_fun);
@@ skipping 335 matching lines @@
   Handle<JSFunction> function = Handle<JSFunction>::cast(
       GetProperty(global, Factory::LookupSymbol(property)));
   return Handle<JSObject>(JSObject::cast(function->prototype()));
 }
 
 
 static void InstallCustomCallGenerator(Handle<JSObject> holder,
                                        const char* function_name,
                                        int id) {
   Handle<String> name = Factory::LookupAsciiSymbol(function_name);
-  Handle<JSFunction> function(JSFunction::cast(holder->GetProperty(*name)));
+  Object* function_object = holder->GetProperty(*name)->ToObjectUnchecked();
+  Handle<JSFunction> function(JSFunction::cast(function_object));
   function->shared()->set_function_data(Smi::FromInt(id));
 }
 
 
 void Genesis::InstallCustomCallGenerators() {
   HandleScope scope;
 #define INSTALL_CALL_GENERATOR(holder_expr, fun_name, name)     \
   {                                                             \
     Handle<JSObject> holder = ResolveCustomCallGeneratorHolder( \
         global_context(), #holder_expr);                        \
@@ skipping 194 matching lines @@
   current->set_state(v8::INSTALLED);
   return result;
 }
 
 
 bool Genesis::InstallJSBuiltins(Handle<JSBuiltinsObject> builtins) {
   HandleScope scope;
   for (int i = 0; i < Builtins::NumberOfJavaScriptBuiltins(); i++) {
     Builtins::JavaScript id = static_cast<Builtins::JavaScript>(i);
     Handle<String> name = Factory::LookupAsciiSymbol(Builtins::GetName(id));
+    Object* function_object = builtins->GetPropertyNoExceptionThrown(*name);
     Handle<JSFunction> function
-        = Handle<JSFunction>(JSFunction::cast(builtins->GetProperty(*name)));
+        = Handle<JSFunction>(JSFunction::cast(function_object));
     builtins->set_javascript_builtin(id, *function);
     Handle<SharedFunctionInfo> shared
         = Handle<SharedFunctionInfo>(function->shared());
     if (!EnsureCompiled(shared, CLEAR_EXCEPTION)) return false;
     // Set the code object on the function object.
     function->set_code(function->shared()->code());
     builtins->set_javascript_builtin_code(id, shared->code());
   }
   return true;
 }
@@ skipping 264 matching lines @@
 }
 
 
 // Restore statics that are thread local.
 char* BootstrapperActive::RestoreState(char* from) {
   nesting_ = *reinterpret_cast<int*>(from);
   return from + sizeof(nesting_);
 }
 
 } }  // namespace v8::internal