Refactoring button field and its type (2nd try)

content/common/input/synthetic_web_input_event_builders.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 "content/common/input/synthetic_web_input_event_builders.h"
 
 #include "base/logging.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "ui/events/base_event_utils.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ skipping 22 matching lines @@
     int modifiers) {
   DCHECK(WebInputEvent::isMouseEventType(type));
   WebMouseEvent result = Build(type);
   result.x = window_x;
   result.y = window_y;
   result.windowX = window_x;
   result.windowY = window_y;
   result.modifiers = modifiers;
 
   if (type == WebInputEvent::MouseDown || type == WebInputEvent::MouseUp)
-    result.button = WebMouseEvent::ButtonLeft;
+    result.button = WebMouseEvent::Button::Left;
   else
-    result.button = WebMouseEvent::ButtonNone;
+    result.button = WebMouseEvent::Button::NoButton;
 
   return result;
 }
 
 WebMouseWheelEvent SyntheticWebMouseWheelEventBuilder::Build(
     WebMouseWheelEvent::Phase phase) {
   WebMouseWheelEvent result;
   result.type = WebInputEvent::MouseWheel;
   result.phase = phase;
   return result;
@@ skipping 178 matching lines @@
   touches[index].state = WebTouchPoint::StateCancelled;
   WebTouchEventTraits::ResetType(
       WebInputEvent::TouchCancel, timeStampSeconds, this);
 }
 
 void SyntheticWebTouchEvent::SetTimestamp(base::TimeTicks timestamp) {
   timeStampSeconds = ui::EventTimeStampToSeconds(timestamp);
 }
 
 }  // namespace content