GTK: Add TRACE_EVENTs around gtk ui events.

content/browser/renderer_host/render_widget_host_view_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 "content/browser/renderer_host/render_widget_host_view_gtk.h"
 
 // If this gets included after the gtk headers, then a bunch of compiler
 // errors happen because of a "#define Status int" in Xlib.h, which interacts
 // badly with net::URLRequestStatus::Status.
 #include "content/common/view_messages.h"
 
 #include <cairo/cairo.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 
 #include <algorithm>
 #include <string>
 
 #include "base/command_line.h"
+#include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "content/browser/renderer_host/backing_store_gtk.h"
 #include "content/browser/renderer_host/gtk_im_context_wrapper.h"
 #include "content/browser/renderer_host/gtk_window_utils.h"
 #include "content/browser/renderer_host/render_view_host.h"
@@ skipping 765 matching lines @@
   im_context_->UpdateInputMethodState(type, can_compose_inline);
 }
 
 void RenderWidgetHostViewGtk::ImeCancelComposition() {
   im_context_->CancelComposition();
 }
 
 void RenderWidgetHostViewGtk::DidUpdateBackingStore(
     const gfx::Rect& scroll_rect, int scroll_dx, int scroll_dy,
     const std::vector<gfx::Rect>& copy_rects) {
+  TRACE_EVENT0("ui::gtk", "RenderWidgetHostViewGtk::DidUpdateBackingStore");
+
   if (is_hidden_)
     return;
 
   // TODO(darin): Implement the equivalent of Win32's ScrollWindowEX.  Can that
   // be done using XCopyArea?  Perhaps similar to
   // BackingStore::ScrollBackingStore?
   if (about_to_validate_and_paint_)
     invalid_rect_ = invalid_rect_.Union(scroll_rect);
   else
     Paint(scroll_rect);
@@ skipping 250 matching lines @@
     event->y += new_dragged_at_vertical_edge;
   } else {
     // Clear whenever we get a non-drag mouse move.
     drag_monitor_size.SetSize(0, 0);
   }
   dragged_at_horizontal_edge_ = new_dragged_at_horizontal_edge;
   dragged_at_vertical_edge_ = new_dragged_at_vertical_edge;
 }
 
 void RenderWidgetHostViewGtk::Paint(const gfx::Rect& damage_rect) {
+  TRACE_EVENT0("ui::gtk", "RenderWidgetHostViewGtk::Paint");
+
   // If the GPU process is rendering directly into the View,
   // call the compositor directly.
   RenderWidgetHost* render_widget_host = GetRenderWidgetHost();
   if (render_widget_host->is_accelerated_compositing_active()) {
     host_->ScheduleComposite();
     return;
   }
 
   GdkWindow* window = gtk_widget_get_window(view_.get());
   DCHECK(!about_to_validate_and_paint_);
@@ skipping 272 matching lines @@
   }
 }
 
 // static
 void RenderWidgetHostView::GetDefaultScreenInfo(
     WebKit::WebScreenInfo* results) {
   GdkWindow* gdk_window =
       gdk_display_get_default_group(gdk_display_get_default());
   content::GetScreenInfoFromNativeWindow(gdk_window, results);
 }