Scale the location of drag image for high DPI

ui/views/widget/desktop_aura/desktop_drag_drop_client_aurax11.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_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_
 
 #include <X11/Xlib.h>
 
 #include <memory>
 #include <set>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/timer/timer.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/gfx/geometry/point.h"
+#include "ui/gfx/geometry/size.h"
 #include "ui/gfx/x/x11_atom_cache.h"
 #include "ui/views/views_export.h"
 #include "ui/views/widget/desktop_aura/x11_move_loop_delegate.h"
 #include "ui/wm/public/drag_drop_client.h"
 
 namespace aura {
 namespace client {
 class DragDropDelegate;
 }
 }
@@ skipping 79 matching lines @@
       X11MoveLoopDelegate* delegate);
 
   // Finds the topmost X11 window at |screen_point| and returns it if it is
   // Xdnd aware. Returns NULL otherwise.
   virtual ::Window FindWindowFor(const gfx::Point& screen_point);
 
   // Sends |xev| to |xid|, optionally short circuiting the round trip to the X
   // server.
   virtual void SendXClientEvent(::Window xid, XEvent* xev);
 
+ protected:
+  Widget* drag_widget() { return drag_widget_.get(); }
+
  private:
   enum SourceState {
     // |source_current_window_| will receive a drop once we receive an
     // XdndStatus from it.
     SOURCE_STATE_PENDING_DROP,
 
     // The move looped will be ended once we receive XdndFinished from
     // |source_current_window_|. We should not send XdndPosition to
     // |source_current_window_| while in this state.
     SOURCE_STATE_DROPPED,
@@ skipping 140 matching lines @@
   // no action that we can agree on.
   ui::DragDropTypes::DragOperation negotiated_operation_;
 
   // Ends the move loop if the target is too slow to respond after the mouse is
   // released.
   base::OneShotTimer end_move_loop_timer_;
 
   // Widget that the user drags around. May be NULL.
   std::unique_ptr<Widget> drag_widget_;
 
+  // The size of drag image.
+  gfx::Size drag_image_size_;
+
   // The offset of |drag_widget_| relative to the mouse position.
   gfx::Vector2d drag_widget_offset_;
 
   base::WeakPtrFactory<DesktopDragDropClientAuraX11> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopDragDropClientAuraX11);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_