Use correct coordinates for last moust location in SynthesizeMouseMoveEvent

ui/aura/root_window.cc

 // 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.
 
 #include "ui/aura/root_window.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 970 matching lines @@
       base::Bind(&RootWindow::SynthesizeMouseMoveEvent,
                  event_factory_.GetWeakPtr()));
 }
 
 void RootWindow::SynthesizeMouseMoveEvent() {
   if (!synthesize_mouse_move_)
     return;
   synthesize_mouse_move_ = false;
 #if !defined(OS_WIN)
   // Temporarily disabled for windows. See crbug.com/112222.
-  gfx::Point3f point(Env::GetInstance()->last_mouse_location());
+  gfx::Point3f point(GetLastMouseLocationInRoot());
   ui::Transform transform = layer()->transform();
   float scale = ui::GetDeviceScaleFactor(layer());
   transform.ConcatScale(scale, scale);
   transform.TransformPoint(point);
   gfx::Point orig_mouse_location = point.AsPoint();
 
   // TODO(derat|oshima): Don't use mouse_button_flags_ as it's
   // currently broken. See/ crbug.com/107931.
   MouseEvent event(ui::ET_MOUSE_MOVED,
                    orig_mouse_location,
                    orig_mouse_location,
                    ui::EF_IS_SYNTHESIZED);
   DispatchMouseEvent(&event);
 #endif
 }
 
 void RootWindow::UnlockCompositor() {
   DCHECK(compositor_lock_);
   compositor_lock_ = NULL;
   if (draw_on_compositor_unlock_) {
     draw_on_compositor_unlock_ = false;
     ScheduleDraw();
   }
 }
 
 }  // namespace aura