Replace views::Event with ui::Event.

ui/views/examples/tree_view_example.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/examples/tree_view_example.h"
 
 #include "base/utf_string_conversions.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/controls/tree/tree_view.h"
@@ skipping 72 matching lines @@
   NodeType* new_node = new NodeType(selected_node->GetTitle(), 1);
   model_.Add(selected_node, new_node, selected_node->child_count());
   tree_view_->SetSelectedNode(new_node);
 }
 
 bool TreeViewExample::IsCommandIdEnabled(int command_id) {
   return command_id != ID_REMOVE ||
       tree_view_->GetSelectedNode() != model_.GetRoot();
 }
 
-void TreeViewExample::ButtonPressed(Button* sender, const Event& event) {
+void TreeViewExample::ButtonPressed(Button* sender, const ui::Event& event) {
   NodeType* selected_node =
       static_cast<NodeType*>(tree_view_->GetSelectedNode());
   if (sender == add_) {
     AddNewNode();
   } else if (sender == remove_) {
     DCHECK(selected_node);
     DCHECK_NE(model_.GetRoot(), selected_node);
     model_.Remove(selected_node->parent(), selected_node);
   } else if (sender == change_title_) {
     DCHECK(selected_node);
@@ skipping 59 matching lines @@
     case ID_ADD:
       AddNewNode();
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace examples
 }  // namespace views