Removes grab input window and extra grab and ungrab in X11WholeScreenMoveLoop

ui/views/widget/desktop_aura/x11_whole_screen_move_loop.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_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 27 matching lines @@
   // ui:::PlatformEventDispatcher:
   virtual bool CanDispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
   virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
 
   // Runs the nested message loop. While the mouse is grabbed, use |cursor| as
   // the mouse cursor. Returns true if the move-loop is completed successfully.
   // If the pointer-grab fails, or the move-loop is canceled by the user (e.g.
   // by pressing escape), then returns false.
   bool RunMoveLoop(aura::Window* window, gfx::NativeCursor cursor);
 
-  // Updates the cursor while the move loop is running.
-  void UpdateCursor(gfx::NativeCursor cursor);
-
   // Ends the RunMoveLoop() that's currently in progress.
   void EndMoveLoop();
 
+  // Returns true if still running a nested message loop, false otherwise.
+  bool in_move_loop() const { return in_move_loop_; }
+
   // Sets an image to be used during the drag.
   void SetDragImage(const gfx::ImageSkia& image, gfx::Vector2dF offset);
 
  private:
-  // Grabs the pointer and keyboard, setting the mouse cursor to |cursor|.
-  // Returns true if the grab was successful.
-  bool GrabPointerAndKeyboard(gfx::NativeCursor cursor);
-
-  // Creates an input-only window to be used during the drag.
-  Window CreateDragInputWindow(XDisplay* display);
-
   // Creates a window to show the drag image during the drag.
   void CreateDragImageWindow();
 
   // Checks to see if |in_image| is an image that has any visible regions
   // (defined as having a pixel with alpha > 32). If so, return true.
   bool CheckIfIconValid();
 
   // Dispatch mouse movement event to |delegate_| in a posted task.
   void DispatchMouseMovement();
 
   X11WholeScreenMoveLoopDelegate* delegate_;
 
   // Are we running a nested message loop from RunMoveLoop()?
   bool in_move_loop_;
   scoped_ptr<ui::ScopedEventDispatcher> nested_dispatcher_;
 
   bool should_reset_mouse_flags_;
 
-  // An invisible InputOnly window . We create this window so we can track the
-  // cursor wherever it goes on screen during a drag, since normal windows
-  // don't receive pointer motion events outside of their bounds.
-  ::Window grab_input_window_;
-
   base::Closure quit_closure_;
 
   // Keeps track of whether the move-loop is cancled by the user (e.g. by
   // pressing escape).
   bool canceled_;
 
   // A Widget is created during the drag if there is an image available to be
   // used during the drag.
   scoped_ptr<Widget> drag_widget_;
   gfx::ImageSkia drag_image_;
   gfx::Vector2dF drag_offset_;
   XMotionEvent last_xmotion_;
   base::WeakPtrFactory<X11WholeScreenMoveLoop> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(X11WholeScreenMoveLoop);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WHOLE_SCREEN_MOVE_LOOP_H_