Change the way the ToplevelEventHandler is hooked up. It is now both a pre- and post-target event h…

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 209 matching lines @@
 // The caller is responsible for ensuring that this is a mouse/touchpad event
 // before calling this function.
 UI_EXPORT bool IsTouchpadEvent(const base::NativeEvent& event);
 
 // Returns true if event is noop.
 UI_EXPORT bool IsNoopEvent(const base::NativeEvent& event);
 
 // Creates and returns no-op event.
 UI_EXPORT base::NativeEvent CreateNoopEvent();
 
+// Returns true if default post-target handling was canceled for |event| after
+// its dispatch to its target.
+UI_EXPORT bool EventCanceledDefaultHandling(const ui::Event& event);
+
 #if defined(OS_WIN)
 UI_EXPORT int GetModifiersFromACCEL(const ACCEL& accel);
 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_