Refactoring button field and its type

chrome/browser/apps/window_controls_browsertest.cc

 // Copyright 2013 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/apps/app_browsertest_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/infobars/core/infobar_delegate.h"
 #include "content/public/test/browser_test_utils.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/common/switches.h"
@@ skipping 45 matching lines @@
   // Send a left click on the "Close" button and wait for the close action
   // to happen.
   ExtensionTestMessageListener window_closed("window-closed", false);
 
   // Send mouse click somewhere inside the [x] button
   const int controlOffset = 25;
   int x = web_contents->GetContainerBounds().size().width() - controlOffset;
   int y = controlOffset;
   content::SimulateMouseClickAt(web_contents,
                                 0,
-                                blink::WebMouseEvent::ButtonLeft,
+                                blink::WebMouseEvent::Button::Left,
                                 gfx::Point(x, y));
 
   ASSERT_TRUE(window_closed.WaitUntilSatisfied());
 }