Replace views::Event with ui::Event.

ash/shell/lock_view.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 "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "ash/shell/example_factory.h"
 #include "ash/tooltips/tooltip_controller.h"
 #include "base/utf_string_conversions.h"
@@ skipping 50 matching lines @@
       unlock_button_->RequestFocus();
   }
 
   // Overridden from views::WidgetDelegateView:
   virtual void WindowClosing() OVERRIDE {
     Shell::GetInstance()->delegate()->UnlockScreen();
   }
 
   // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* sender,
-                             const views::Event& event) OVERRIDE {
+                             const ui::Event& event) OVERRIDE {
     DCHECK(sender == unlock_button_);
     GetWidget()->Close();
   }
 
   gfx::Font font_;
   views::NativeTextButton* unlock_button_;
 
   DISALLOW_COPY_AND_ASSIGN(LockView);
 };
 
@@ skipping 17 matching lines @@
   widget->Show();
   widget->GetNativeView()->SetName("LockView");
   widget->GetNativeView()->Focus();
 
   Shell::GetInstance()->tooltip_controller()->UpdateTooltip(
       widget->GetNativeView());
 }
 
 }  // namespace shell
 }  // namespace ash