GTK: Add TRACE_EVENTs around gtk ui events.

chrome/browser/ui/gtk/reload_button_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 "chrome/browser/ui/gtk/reload_button_gtk.h"
 
 #include <algorithm>
 
+#include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/gtk/gtk_chrome_button.h"
 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "chrome/browser/ui/gtk/location_bar_view_gtk.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/notification_source.h"
 #include "grit/generated_resources.h"
@@ skipping 170 matching lines @@
                               &ReloadButtonGtk::OnDoubleClickTimer);
 
     if (browser_)
       browser_->ExecuteCommandWithDisposition(command, disposition);
     ++testing_reload_count_;
   }
 }
 
 gboolean ReloadButtonGtk::OnExpose(GtkWidget* widget,
                                    GdkEventExpose* e) {
+  TRACE_EVENT0("ui::gtk", "ReloadButtonGtk::OnExpose");
   if (theme_service_ && theme_service_->UsingNativeTheme())
     return FALSE;
   return ((visible_mode_ == MODE_RELOAD) ? reload_ : stop_).OnExpose(
       widget, e, hover_controller_.GetCurrentValue());
 }
 
 gboolean ReloadButtonGtk::OnLeaveNotify(GtkWidget* /* widget */,
                                         GdkEventCrossing* /* event */) {
   ChangeMode(intended_mode_, true);
   return FALSE;
@@ skipping 62 matching lines @@
   gtk_chrome_button_set_use_gtk_rendering(GTK_CHROME_BUTTON(widget()), use_gtk);
 }
 
 void ReloadButtonGtk::OnDoubleClickTimer() {
   ChangeMode(intended_mode_, false);
 }
 
 void ReloadButtonGtk::OnStopToReloadTimer() {
   ChangeMode(intended_mode_, true);
 }