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

base/message_pump_gtk.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_gtk.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdkx.h>
 
 #include "base/profiler/scoped_profile.h"
@@ skipping 73 matching lines @@
 
   DidProcessEvent(event);
 }
 
 // static
 Display* MessagePumpGtk::GetDefaultXDisplay() {
   static GdkDisplay* display = gdk_display_get_default();
   return display ? GDK_DISPLAY_XDISPLAY(display) : NULL;
 }
 
+bool MessagePumpGtk::RunOnce(GMainContext* context, bool block) {
+  // g_main_context_iteration returns true if events have been dispatched.
+  return g_main_context_iteration(context, block);
+}
+
 void MessagePumpGtk::WillProcessEvent(GdkEvent* event) {
   FOR_EACH_OBSERVER(MessagePumpObserver, observers(), WillProcessEvent(event));
 }
 
 void MessagePumpGtk::DidProcessEvent(GdkEvent* event) {
   FOR_EACH_OBSERVER(MessagePumpObserver, observers(), DidProcessEvent(event));
 }
 
 // static
 void MessagePumpGtk::EventDispatcher(GdkEvent* event, gpointer data) {
   MessagePumpGtk* message_pump = reinterpret_cast<MessagePumpGtk*>(data);
   message_pump->DispatchEvents(event);
 }
 
 }  // namespace base