Explicitly coerce PostDispatchAction to uint32_t in DispatchEvent()

ui/views/widget/desktop_aura/desktop_drag_drop_client_aurax11.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_drag_drop_client_aurax11.h"
 
 #include <X11/Xatom.h>
 
 #include "base/event_types.h"
 #include "base/lazy_instance.h"
@@ skipping 345 matching lines @@
 bool DesktopDragDropClientAuraX11::X11DragContext::CanDispatchEvent(
     const ui::PlatformEvent& event) {
   return event->xany.window == source_window_;
 }
 
 uint32_t DesktopDragDropClientAuraX11::X11DragContext::DispatchEvent(
     const ui::PlatformEvent& event) {
   if (event->type == PropertyNotify &&
       event->xproperty.atom == atom_cache_->GetAtom("XdndActionList")) {
     ReadActions();
-    return ui::POST_DISPATCH_STOP_PROPAGATION;
+    return ui::kPostDispatchStopPropagation;
   }
-  return ui::POST_DISPATCH_NONE;
+  return ui::kPostDispatchNone;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DesktopDragDropClientAuraX11::DesktopDragDropClientAuraX11(
     aura::Window* root_window,
     views::DesktopNativeCursorManager* cursor_manager,
     Display* xdisplay,
     ::Window xwindow)
     : root_window_(root_window),
@@ skipping 749 matching lines @@
     for (int x = 0; x < in_bitmap->width(); ++x) {
       if (SkColorGetA(in_row[x]) > kMinAlpha)
         return true;
     }
   }
 
   return false;
 }
 
 }  // namespace views