aura: Fix the sythentic mouse-event location.

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 13 matching lines @@
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/base/gestures/gesture_recognizer.h"
 #include "ui/base/gestures/gesture_types.h"
 #include "ui/base/hit_test.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animator.h"
 #include "ui/gfx/monitor.h"
+#include "ui/gfx/point3.h"
 #include "ui/gfx/screen.h"
 
 using std::vector;
 
 namespace aura {
 
 namespace {
 
 // These are the mouse events generated when a gesture goes unprocessed.
 const ui::EventType kScrollBeginTypes[] = {
@@ skipping 952 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::Point orig_mouse_location = last_mouse_location_;
-  layer()->transform().TransformPoint(orig_mouse_location);
+  gfx::Point3f point(last_mouse_location_);
+  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