Revert of Refactoring button field and its type

content/renderer/render_view_browsertest.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 <stddef.h>
 #include <stdint.h>
 #include <tuple>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 1448 matching lines @@
   EXPECT_EQ(1, view()->history_list_offset_);
 }
 
 TEST_F(RenderViewImplTest, ContextMenu) {
   LoadHTML("<div>Page A</div>");
 
   // Create a right click in the center of the iframe. (I'm hoping this will
   // make this a bit more robust in case of some other formatting or other bug.)
   WebMouseEvent mouse_event;
   mouse_event.type = WebInputEvent::MouseDown;
-  mouse_event.button = WebMouseEvent::Button::Right;
+  mouse_event.button = WebMouseEvent::ButtonRight;
   mouse_event.x = 250;
   mouse_event.y = 250;
   mouse_event.globalX = 250;
   mouse_event.globalY = 250;
 
   SendWebMouseEvent(mouse_event);
 
   // Now simulate the corresponding up event which should display the menu
   mouse_event.type = WebInputEvent::MouseUp;
   SendWebMouseEvent(mouse_event);
@@ skipping 1000 matching lines @@
   ExpectPauseAndResume(3);
   blink::WebScriptSource source2(
       WebString::fromUTF8("function func2() { func1(); }; func2();"));
   frame()->GetWebFrame()->executeScriptInIsolatedWorld(17, &source2, 1, 1);
 
   EXPECT_FALSE(IsPaused());
   Detach();
 }
 
 }  // namespace content