GTK: Add TRACE_EVENTs around gtk ui events.

content/browser/renderer_host/render_widget_host.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.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
+#include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "content/browser/accessibility/browser_accessibility_state.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
 #include "content/browser/renderer_host/backing_store.h"
 #include "content/browser/renderer_host/backing_store_manager.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
 #include "content/browser/user_metrics.h"
@@ skipping 407 matching lines @@
                                    const gfx::Size& page_size,
                                    const gfx::Size& desired_size) {
   // Ask the renderer to create a bitmap regardless of whether it's
   // hidden, being resized, redrawn, etc.  It resizes the web widget
   // to the page_size and then scales it to the desired_size.
   Send(new ViewMsg_PaintAtSize(routing_id_, dib_handle, tag,
                                page_size, desired_size));
 }
 
 BackingStore* RenderWidgetHost::GetBackingStore(bool force_create) {
+  TRACE_EVENT2("renderer_host", "RenderWidgetHost::GetBackingStore",
+               "width", base::IntToString(current_size_.width()),
+               "height", base::IntToString(current_size_.height()));
+
   // We should not be asked to paint while we are hidden.  If we are hidden,
   // then it means that our consumer failed to call WasRestored. If we're not
   // force creating the backing store, it's OK since we can feel free to give
   // out our cached one if we have it.
   DCHECK(!is_hidden_ || !force_create) <<
       "GetBackingStore called while hidden!";
 
   // We should never be called recursively; this can theoretically lead to
   // infinite recursion and almost certainly leads to lower performance.
   DCHECK(!in_get_backing_store_) << "GetBackingStore called recursively!";
@@ skipping 1074 matching lines @@
     ui_shim->Send(new AcceleratedSurfaceMsg_BuffersSwappedACK(route_id));
 }
 
 // static
 void RenderWidgetHost::AcknowledgePostSubBuffer(int32 route_id,
                                                 int gpu_host_id) {
   GpuProcessHostUIShim* ui_shim = GpuProcessHostUIShim::FromID(gpu_host_id);
   if (ui_shim)
     ui_shim->Send(new AcceleratedSurfaceMsg_PostSubBufferACK(route_id));
 }