Refactoring button field and its type (2nd try)

content/browser/frame_host/render_widget_host_view_guest.cc

 // Copyright 2014 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/frame_host/render_widget_host_view_guest.h"
 
 #include <utility>
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 591 matching lines @@
     // incorrect to determine the position of the context menu(they are not the
     // actual X, Y of the window). As a hack, we report the last location of a
     // right mouse up to the BrowserPluginGuest to inform it of the next
     // potential location for context menu (BUG=470087).
     // TODO(ekaramad): Find a better and more fundamental solution. Could the
     // ContextMenuParams be based on global X, Y?
     const blink::WebMouseEvent& mouse_event =
         static_cast<const blink::WebMouseEvent&>(*event);
     // A MouseDown on the ButtonRight could suggest a ContextMenu.
     if (guest_ && mouse_event.type == blink::WebInputEvent::MouseDown &&
-        mouse_event.button == blink::WebPointerProperties::ButtonRight)
+        mouse_event.button == blink::WebPointerProperties::Button::Right)
       guest_->SetContextMenuPosition(
           gfx::Point(mouse_event.globalX - GetViewBounds().x(),
                      mouse_event.globalY - GetViewBounds().y()));
     host_->ForwardMouseEvent(mouse_event);
     return;
   }
 
   if (event->type == blink::WebInputEvent::MouseWheel) {
     host_->ForwardWheelEvent(
         *static_cast<const blink::WebMouseWheelEvent*>(event));
@@ skipping 36 matching lines @@
         gesture_event.data.scrollUpdate.inertialPhase ==
             blink::WebGestureEvent::MomentumPhase) {
       return;
     }
     host_->ForwardGestureEvent(gesture_event);
     return;
   }
 }
 
 }  // namespace content