Magnifier: Prevent the cursor jumping on HiDPI display.

ui/aura/root_window.cc

Index: ui/aura/root_window.cc
diff --git a/ui/aura/root_window.cc b/ui/aura/root_window.cc
index 5339fff018ef6850bbd59a4d90bc9ffa16455881..1dfb3da59113b7a17d640b29a0430284b57eecc2 100644
--- a/ui/aura/root_window.cc
+++ b/ui/aura/root_window.cc
@@ -552,6 +552,14 @@ void RootWindow::SetRootWindowTransformer(
     OnHostResized(host_->GetBounds().size());
 }
 
+gfx::Transform RootWindow::GetRootTransform() const {
+  float scale = ui::GetDeviceScaleFactor(layer());
+  gfx::Transform transform;
+  transform.Scale(scale, scale);
+  transform *= transformer_->GetTransform();
+  return transform;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindow, ui::EventTarget implementation:
 
@@ -1170,14 +1178,6 @@ void RootWindow::SynthesizeMouseMoveEvent() {
   OnHostMouseEvent(&event);
 }
 
-gfx::Transform RootWindow::GetRootTransform() const {
-  float scale = ui::GetDeviceScaleFactor(layer());
-  gfx::Transform transform;
-  transform.Scale(scale, scale);
-  transform *= transformer_->GetTransform();
-  return transform;
-}
-
 gfx::Transform RootWindow::GetInverseRootTransform() const {
   float scale = ui::GetDeviceScaleFactor(layer());
   gfx::Transform transform;