gesture recognizer: Remove the touch-event queue.

ui/base/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_BASE_EVENTS_EVENT_CONSTANTS_H_
 #define UI_BASE_EVENTS_EVENT_CONSTANTS_H_
 
 #include "base/event_types.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 86 matching lines @@
 };
 
 // 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.
-  ER_ASYNC     = 1 << 2,  // The event will be processed asynchronously. The
-                          // event can still be propagated to other handlers.
 };
 
 // Phase of the event dispatch.
 enum EventPhase {
   EP_PREDISPATCH,
   EP_PRETARGET,
   EP_TARGET,
   EP_POSTTARGET,
   EP_POSTDISPATCH
 };
@@ skipping 115 matching lines @@
 UI_EXPORT int GetModifiersFromKeyState();
 
 // Returns true if |message| identifies a mouse event that was generated as the
 // result of a touch event.
 UI_EXPORT bool IsMouseEventFromTouch(UINT message);
 #endif
 
 }  // namespace ui
 
 #endif  // UI_BASE_EVENTS_EVENT_CONSTANTS_H_