gtk: Extract event functions into event_utils module.

chrome/browser/ui/gtk/back_forward_button_gtk.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/gtk/back_forward_button_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/gtk/event_utils.h"
 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "chrome/browser/ui/gtk/menu_gtk.h"
 #include "chrome/browser/ui/toolbar/back_forward_menu_model.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "grit/theme_resources_standard.h"
 #include "ui/base/l10n/l10n_util.h"
 
 // The time in milliseconds between when the user clicks and the menu appears.
@@ skipping 60 matching lines @@
   menu_.reset(new MenuGtk(this, menu_model_.get()));
   button_->SetPaintOverride(GTK_STATE_ACTIVE);
   menu_->PopupForWidget(widget(), button, event_time);
 }
 
 void BackForwardButtonGtk::OnClick(GtkWidget* widget) {
   weak_factory_.InvalidateWeakPtrs();
 
   browser_->ExecuteCommandWithDisposition(
       is_forward_ ? IDC_FORWARD : IDC_BACK,
-      gtk_util::DispositionForCurrentButtonPressEvent());
+      event_utils::DispositionForCurrentButtonPressEvent());
 }
 
 gboolean BackForwardButtonGtk::OnButtonPress(GtkWidget* widget,
                                              GdkEventButton* event) {
   if (event->button == 3)
     ShowBackForwardMenu(event->button, event->time);
 
   if (event->button != 1)
     return FALSE;
 
@@ skipping 19 matching lines @@
   int drag_min_distance;
   g_object_get(settings, "gtk-dnd-drag-threshold", &drag_min_distance, NULL);
   if (event->y - y_position_of_last_press_ < drag_min_distance)
     return FALSE;
 
   // We will show the menu now. Cancel the delayed event.
   weak_factory_.InvalidateWeakPtrs();
   ShowBackForwardMenu(/* button */ 1, event->time);
   return FALSE;
 }