Move cursor when it's hidden so that UX can update correctly

ui/aura/env.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_AURA_ENV_H_
 #define UI_AURA_ENV_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/observer_list.h"
@@ skipping 33 matching lines @@
   void set_mouse_button_flags(int mouse_button_flags) {
     mouse_button_flags_ = mouse_button_flags;
   }
 
   // Gets/sets the last mouse location seen in a mouse event in the screen
   // coordinates.
   const gfx::Point& last_mouse_location() const { return last_mouse_location_; }
   void SetLastMouseLocation(const Window& window,
                             const gfx::Point& location_in_root);
 
+  // If |cursor_shown| is false, sets the last_mouse_position to an invalid
+  // location. If |cursor_shown| is true, restores the last_mouse_position.
+  void SetCursorShown(bool cursor_shown);
+
   // Whether any touch device is currently down.
   bool is_touch_down() const { return is_touch_down_; }
   void set_touch_down(bool value) { is_touch_down_ = value; }
 
   // Whether RenderWidgetHostViewAura::OnPaint() should paint white background
   // when backing store is not present. Default is true.
   // In some cases when page is using transparent background painting white
   // background before backing store is initialized causes a white splash.
   bool render_white_bg() const { return render_white_bg_; }
   void set_render_white_bg(bool value) { render_white_bg_ = value; }
@@ skipping 29 matching lines @@
 
   ObserverList<EnvObserver> observers_;
 #if !defined(OS_MACOSX)
   scoped_ptr<MessageLoop::Dispatcher> dispatcher_;
 #endif
 
   static Env* instance_;
   int mouse_button_flags_;
   // Location of last mouse event, in screen coordinates.
   gfx::Point last_mouse_location_;
+  // If the cursor is hidden, saves the previous last_mouse_position.
+  gfx::Point hidden_cursor_location_;
+  bool is_cursor_hidden_;
   bool is_touch_down_;
   bool render_white_bg_;
   client::StackingClient* stacking_client_;
   scoped_ptr<DisplayManager> display_manager_;
   scoped_ptr<EventFilter> event_filter_;
 
 #if defined(USE_X11)
   scoped_ptr<internal::DisplayChangeObserverX11> display_change_observer_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(Env);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ENV_H_