Refactoring button field and its type

content/browser/renderer_host/input/touch_emulator.cc

Index: content/browser/renderer_host/input/touch_emulator.cc
diff --git a/content/browser/renderer_host/input/touch_emulator.cc b/content/browser/renderer_host/input/touch_emulator.cc
index f09716a68c8e3ec8019d51afffcd99cd12dac98e..cacaf5560da6420f5cbf45882662722e14d5e277 100644
--- a/content/browser/renderer_host/input/touch_emulator.cc
+++ b/content/browser/renderer_host/input/touch_emulator.cc
@@ -141,12 +141,12 @@ bool TouchEmulator::HandleMouseEvent(const WebMouseEvent& mouse_event) {
   if (!enabled())
     return false;
 
-  if (mouse_event.button == WebMouseEvent::ButtonRight &&
+  if (mouse_event.button == WebMouseEvent::Button::Right &&
       mouse_event.type == WebInputEvent::MouseDown) {
     client_->ShowContextMenuAtPoint(gfx::Point(mouse_event.x, mouse_event.y));
   }
 
-  if (mouse_event.button != WebMouseEvent::ButtonLeft)
+  if (mouse_event.button != WebMouseEvent::Button::Left)
     return true;
 
   if (mouse_event.type == WebInputEvent::MouseMove) {