[cleanup] [proxies] Unify style of recently written code

src/runtime/runtime-object.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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
@@ skipping 269 matching lines @@
   // 1. Let obj be ? ToObject(O).
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, object,
                                      Execution::ToObject(isolate, object));
   // 2. Let key be ? ToPropertyKey(P).
   Handle<Name> key;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, key,
                                      Object::ToName(isolate, raw_name));
 
   // 3. Let desc be ? obj.[[GetOwnProperty]](key).
   PropertyDescriptor desc;
-  bool found = JSReceiver::GetOwnPropertyDescriptor(
+  Maybe<bool> found = JSReceiver::GetOwnPropertyDescriptor(
       isolate, Handle<JSReceiver>::cast(object), key, &desc);
-  if (isolate->has_pending_exception()) return isolate->heap()->exception();
+  MAYBE_RETURN(found, isolate->heap()->exception());
   // 4. Return FromPropertyDescriptor(desc).
-  if (!found) return isolate->heap()->undefined_value();
+  if (!found.FromJust()) return isolate->heap()->undefined_value();
   return *desc.ToObject(isolate);
 }
 
 
 RUNTIME_FUNCTION(Runtime_PreventExtensions) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, obj, 0);
   MAYBE_RETURN(JSReceiver::PreventExtensions(obj, Object::THROW_ON_ERROR),
                isolate->heap()->exception());
@@ skipping 1129 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_ObjectDefineProperties) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(Object, o, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, properties, 1);
   return JSReceiver::DefineProperties(isolate, o, properties);
 }
 }  // namespace internal
 }  // namespace v8