linux_aura: Improve window drag performance.

ui/views/widget/desktop_aura/desktop_native_widget_aura.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 "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
+#include "base/debug/trace_event.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/client/window_tree_client.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
@@ skipping 1042 matching lines @@
   content_window_->SetBounds(new_bounds);
   // Can be NULL at start.
   if (content_window_container_)
     content_window_container_->SetBounds(new_bounds);
   native_widget_delegate_->OnNativeWidgetSizeChanged(new_bounds.size());
 }
 
 void DesktopNativeWidgetAura::OnRootWindowHostMoved(
     const aura::RootWindow* root,
     const gfx::Point& new_origin) {
+  TRACE_EVENT1("views", "DesktopNativeWidgetAura::OnRootWindowHostMoved",
+               "new_origin", new_origin.ToString());
+
   native_widget_delegate_->OnNativeWidgetMove();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopNativeWidgetAura, NativeWidget implementation:
 
 ui::EventHandler* DesktopNativeWidgetAura::GetEventHandler() {
   return this;
 }
 
 void DesktopNativeWidgetAura::InstallInputMethodEventFilter() {
   DCHECK(!input_method_event_filter_.get());
 
   input_method_event_filter_.reset(
       new corewm::InputMethodEventFilter(root_window_->GetAcceleratedWidget()));
   input_method_event_filter_->SetInputMethodPropertyInRootWindow(
       root_window_.get());
   root_window_event_filter_->AddHandler(input_method_event_filter_.get());
 }
 
 void DesktopNativeWidgetAura::UpdateWindowTransparency() {
   content_window_->SetTransparent(ShouldUseNativeFrame());
 }
 
 }  // namespace views