Explicitly coerce PostDispatchAction to uint32_t in DispatchEvent()

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.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 "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 1899 matching lines @@
         OnWMStateUpdated();
       else if (changed_atom == atom_cache_.GetAtom("_NET_FRAME_EXTENTS"))
         OnFrameExtentsUpdated();
       break;
     }
     case SelectionNotify: {
       drag_drop_client_->OnSelectionNotify(xev->xselection);
       break;
     }
   }
-  return ui::POST_DISPATCH_STOP_PROPAGATION;
+  return ui::kPostDispatchStopPropagation;
 }
 
 void DesktopWindowTreeHostX11::DelayedResize(const gfx::Size& size) {
   OnHostResized(size);
   ResetWindowRegion();
   delayed_resize_task_.Cancel();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHost, public:
@@ skipping 12 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme(window);
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views