Flag mouse messages received when cursor is hidden.

ui/events/event_constants.h

 // 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.
 
 #ifndef UI_EVENTS_EVENT_CONSTANTS_H_
 #define UI_EVENTS_EVENT_CONSTANTS_H_
 
 namespace ui {
 
 // Event types. (prefixed because of a conflict with windows headers)
@@ skipping 120 matching lines @@
 enum MouseEventFlags {
   EF_IS_DOUBLE_CLICK = 1 << 15,
   EF_IS_TRIPLE_CLICK = 1 << 16,
   EF_IS_NON_CLIENT = 1 << 17,
   EF_FROM_TOUCH = 1 << 18,           // Indicates this mouse event is generated
                                      // from an unconsumed touch/gesture event.
   EF_TOUCH_ACCESSIBILITY = 1 << 19,  // Indicates this event was generated from
                                      // touch accessibility mode.
   EF_DIRECT_INPUT = 1 << 20,         // Mouse event coming from direct,
                                      // on-screen input.
+  EF_CURSOR_HIDDEN = 1 << 21,        // Mouse event fired when mouse cursor is
+                                     // not visible. Avoid visible screen
+                                     // changes. (Windows only.)
 };
 
 // Result of dispatching an event.
 enum EventResult {
   ER_UNHANDLED = 0,      // The event hasn't been handled. The event can be
                          // propagated to other handlers.
   ER_HANDLED = 1 << 0,   // The event has already been handled, but it can
                          // still be propagated to other handlers.
   ER_CONSUMED = 1 << 1,  // The event has been handled, and it should not be
                          // propagated to other handlers.
@@ skipping 49 matching lines @@
 // Device type for gesture events.
 enum class GestureDeviceType : int {
   DEVICE_UNKNOWN = 0,
   DEVICE_TOUCHPAD,
   DEVICE_TOUCHSCREEN,
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_CONSTANTS_H_