Refactor MessagePumpX to dispatch events inside of the source Dispatch function.

base/message_pump_wayland.cc

-// Copyright (c) 2011 The Chromium 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 "base/message_pump_wayland.h"
-
-#include <glib.h>
-
-namespace base {
-
-MessagePumpWayland::MessagePumpWayland()
-    : MessagePumpGlib(),
-      context_(g_main_context_default()) {
-}
-
-MessagePumpWayland::~MessagePumpWayland() {
-}
-
-bool MessagePumpWayland::RunOnce(GMainContext* context, bool block) {
-  // g_main_context_iteration returns true if events have been dispatched.
-  return g_main_context_iteration(context, block);
-}
-
-}  // namespace base