Drag on linux

ui/views/widget/desktop_aura/x11_whole_screen_move_loop_delegate.h

 // Copyright (c) 2013 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_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_DELEGATE_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_DELEGATE_H_
 
 #include <X11/Xlib.h>
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
 #undef RootWindow
 
 namespace views {
 
 // Receives mouse events while the X11WholeScreenMoveLoop is tracking a drag on
 // the screen.
 class X11WholeScreenMoveLoopDelegate {
  public:
   // Called when we receive a motion event.
   virtual void OnMouseMovement(XMotionEvent* event) = 0;
 
+  // Called when the mouse button is released.
+  virtual void OnMouseReleased() = 0;
+
   // Called when the user has released the mouse button. The move loop will
   // release the grab after this has been called.
   virtual void OnMoveLoopEnded() = 0;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_DELEGATE_H_