Refactoring button field and its type (2nd try)

content/browser/renderer_host/input/synthetic_gesture_target_aura.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/browser/renderer_host/input/synthetic_gesture_target_aura.h"
 
 #include <stddef.h>
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
@@ skipping 91 matching lines @@
 
     default:
       NOTREACHED();
   }
 
   return ui::ET_UNKNOWN;
 }
 
 int WebMouseEventButtonToFlags(blink::WebMouseEvent::Button button) {
   switch (button) {
-    case blink::WebMouseEvent::ButtonLeft:
+    case blink::WebMouseEvent::Button::Left:
       return ui::EF_LEFT_MOUSE_BUTTON;
 
-    case blink::WebMouseEvent::ButtonMiddle:
+    case blink::WebMouseEvent::Button::Middle:
       return ui::EF_MIDDLE_MOUSE_BUTTON;
 
-    case blink::WebMouseEvent::ButtonRight:
+    case blink::WebMouseEvent::Button::Right:
       return ui::EF_RIGHT_MOUSE_BUTTON;
 
     default:
       NOTREACHED();
   }
 
   return 0;
 }
 
 }  // namespace
@@ skipping 36 matching lines @@
       ->min_distance_for_pinch_scroll_in_pixels();
 }
 
 aura::Window* SyntheticGestureTargetAura::GetWindow() const {
   aura::Window* window = render_widget_host()->GetView()->GetNativeView();
   DCHECK(window);
   return window;
 }
 
 }  // namespace content