aura: Remove NotifyAncestorWindowTransformed in window observer.

ui/aura/window.cc

Index: ui/aura/window.cc
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index 7c1d01aba74af07bb344cf84a59676c50d5d3b3c..2712b0660894b2dd27d3702e0033be7a70f078a0 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -266,7 +266,6 @@ void Window::SetTransform(const gfx::Transform& transform) {
   port_->OnDidChangeTransform(old_transform, transform);
   for (WindowObserver& observer : observers_)
     observer.OnWindowTransformed(this);
-  NotifyAncestorWindowTransformed(this);
 }
 
 void Window::SetLayoutManager(LayoutManager* layout_manager) {
@@ -971,15 +970,6 @@ void Window::NotifyWindowVisibilityChangedUp(aura::Window* target,
   }
 }
 
-void Window::NotifyAncestorWindowTransformed(Window* source) {
-  for (WindowObserver& observer : observers_)
-    observer.OnAncestorWindowTransformed(source, this);
-  for (Window::Windows::const_iterator it = children_.begin();
-       it != children_.end(); ++it) {
-    (*it)->NotifyAncestorWindowTransformed(source);
-  }
-}
-
 bool Window::CleanupGestureState() {
   bool state_modified = false;
   state_modified |= ui::GestureRecognizer::Get()->CancelActiveTouches(this);