Some MaybeHandles related cleanups.

src/api.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 3380 matching lines @@
                                      PropertyAttribute attributes) {
   i::Isolate* isolate = Utils::OpenHandle(obj)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::SetAccessor()", return false);
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   v8::Handle<AccessorSignature> signature;
   i::Handle<i::AccessorInfo> info = MakeAccessorInfo(
       name, getter, setter, data, settings, attributes, signature);
   if (info.is_null()) return false;
   bool fast = Utils::OpenHandle(obj)->HasFastProperties();
-  i::Handle<i::Object> result =
-      i::JSObject::SetAccessor(Utils::OpenHandle(obj), info);
-  if (result.is_null() || result->IsUndefined()) return false;
+  i::Handle<i::Object> result;
+  ASSIGN_RETURN_ON_EXCEPTION_VALUE(
+      isolate, result,
+      i::JSObject::SetAccessor(Utils::OpenHandle(obj), info),
+      false);
+  if (result->IsUndefined()) return false;
   if (fast) i::JSObject::TransformToFastProperties(Utils::OpenHandle(obj), 0);
   return true;
 }
 
 
 bool Object::SetAccessor(Handle<String> name,
                          AccessorGetterCallback getter,
                          AccessorSetterCallback setter,
                          v8::Handle<Value> data,
                          AccessControl settings,
@@ skipping 4195 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal