content: Move render_widget_host_view_gtk to content/ try 2.

ui/base/gtk/owned_widget_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 "chrome/browser/ui/gtk/owned_widget_gtk.h"
+#include "ui/base/gtk/owned_widget_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/logging.h"
 
+namespace ui {
+
 OwnedWidgetGtk::~OwnedWidgetGtk() {
   Destroy();
 }
 
 void OwnedWidgetGtk::Own(GtkWidget* widget) {
   if (!widget)
     return;
 
   DCHECK(!widget_);
   // We want to make sure that Own() was called properly, right after the
@@ skipping 11 matching lines @@
 
   GtkWidget* widget = widget_;
   widget_ = NULL;
   gtk_widget_destroy(widget);
 
   DCHECK(!g_object_is_floating(widget));
   // NOTE: Assumes some implementation details about glib internals.
   DCHECK_EQ(G_OBJECT(widget)->ref_count, 1U);
   g_object_unref(widget);
 }
+
+}  // namespace ui