Replace views::Event with ui::Event.

ui/views/examples/tree_view_example.h

 // 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.
 
 #ifndef UI_VIEWS_EXAMPLES_TREE_VIEW_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_TREE_VIEW_EXAMPLE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/base/models/simple_menu_model.h"
@@ skipping 30 matching lines @@
     ID_ADD
   };
 
   // Adds a new node.
   void AddNewNode();
 
   // Non-const version of IsCommandIdEnabled.
   bool IsCommandIdEnabled(int command_id);
 
   // ButtonListener:
-  virtual void ButtonPressed(Button* sender, const Event& event) OVERRIDE;
+  virtual void ButtonPressed(Button* sender, const ui::Event& event) OVERRIDE;
 
   // TreeViewController:
   virtual void OnTreeViewSelectionChanged(TreeView* tree_view) OVERRIDE;
   virtual bool CanEdit(TreeView* tree_view, ui::TreeModelNode* node) OVERRIDE;
 
   // ContextMenuController:
   virtual void ShowContextMenuForView(View* source,
                                       const gfx::Point& point) OVERRIDE;
 
   // SimpleMenuModel::Delegate:
@@ skipping 18 matching lines @@
 
   scoped_ptr<MenuRunner> context_menu_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(TreeViewExample);
 };
 
 }  // namespace examples
 }  // namespace views
 
 #endif  // UI_VIEWS_EXAMPLES_TREE_VIEW_EXAMPLE_H_