linux_aura: Improve window drag performance.

content/browser/renderer_host/render_widget_host_view_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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
@@ skipping 3020 matching lines @@
     }
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, aura::RootWindowObserver implementation:
 
 void RenderWidgetHostViewAura::OnRootWindowHostMoved(
     const aura::RootWindow* root,
     const gfx::Point& new_origin) {
+  TRACE_EVENT1("ui", "RenderWidgetHostViewAura::OnRootWindowHostMoved",
+               "new_origin", new_origin.ToString());
+
   UpdateScreenInfo(window_);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, SoftwareFrameManagerClient implementation:
 
 void RenderWidgetHostViewAura::SoftwareFrameWasFreed(
     uint32 output_surface_id, unsigned frame_id) {
   ReleaseSoftwareFrame(output_surface_id, frame_id);
 }
@@ skipping 387 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content