GTK: Add TRACE_EVENTs around gtk ui events.

chrome/browser/ui/gtk/custom_button.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/custom_button.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
+#include "base/debug/trace_event.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/common/chrome_notification_types.h"
 #include "content/public/browser/notification_source.h"
 #include "grit/theme_resources_standard.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/gtk_util.h"
 #include "ui/gfx/image/cairo_cached_surface.h"
@@ skipping 46 matching lines @@
   return surfaces_[0]->Width();
 }
 
 int CustomDrawButtonBase::Height() const {
   return surfaces_[0]->Height();
 }
 
 gboolean CustomDrawButtonBase::OnExpose(GtkWidget* widget,
                                         GdkEventExpose* e,
                                         gdouble hover_state) {
+  TRACE_EVENT0("ui::gtk", "CustomDrawButtonBase::OnExpose");
   int paint_state = paint_override_ >= 0 ?
                     paint_override_ : gtk_widget_get_state(widget);
 
   // If the paint state is PRELIGHT then set it to NORMAL (we will paint the
   // hover state according to |hover_state_|).
   if (paint_state == GTK_STATE_PRELIGHT)
     paint_state = GTK_STATE_NORMAL;
   bool animating_hover = hover_state > 0.0 &&
       paint_state == GTK_STATE_NORMAL;
   gfx::CairoCachedSurface* pixbuf = PixbufForState(paint_state);
@@ skipping 240 matching lines @@
   gtk_widget_queue_draw(widget());
 }
 
 void CustomDrawButton::SetBackground(SkColor color,
                                      SkBitmap* image, SkBitmap* mask) {
   button_base_.SetBackground(color, image, mask);
 }
 
 gboolean CustomDrawButton::OnCustomExpose(GtkWidget* sender,
                                           GdkEventExpose* e) {
+  UNSHIPPED_TRACE_EVENT0("ui::gtk", "CustomDrawButtonBase::OnCustomExpose");
   if (UseGtkTheme()) {
     // Continue processing this expose event.
     return FALSE;
   } else {
     double hover_state = hover_controller_.GetCurrentValue();
     return button_base_.OnExpose(sender, e, hover_state);
   }
 }
 
 // static
@@ skipping 20 matching lines @@
   }
 
   gtk_chrome_button_set_use_gtk_rendering(
       GTK_CHROME_BUTTON(widget()), UseGtkTheme());
 }
 
 bool CustomDrawButton::UseGtkTheme() {
   return !forcing_chrome_theme_ && theme_service_ &&
       theme_service_->UsingNativeTheme();
 }