Make Window::ContainsPoint and Window::ContainsPointInRoot const.

ui/aura/window.cc

Index: ui/aura/window.cc
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index 12e7787ea3858e9aee511053e46bb8e4f92af3d7..3035ffadd6c6ec50f1341bd594d3195ae6fe4215 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -479,8 +479,8 @@ void Window::RemoveObserver(WindowObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
-bool Window::ContainsPointInRoot(const gfx::Point& point_in_root) {
-  Window* root_window = GetRootWindow();
+bool Window::ContainsPointInRoot(const gfx::Point& point_in_root) const {
+  const Window* root_window = GetRootWindow();
   if (!root_window)
     return false;
   gfx::Point local_point(point_in_root);
@@ -488,7 +488,7 @@ bool Window::ContainsPointInRoot(const gfx::Point& point_in_root) {
   return gfx::Rect(GetTargetBounds().size()).Contains(local_point);
 }
 
-bool Window::ContainsPoint(const gfx::Point& local_point) {
+bool Window::ContainsPoint(const gfx::Point& local_point) const {
   return gfx::Rect(bounds().size()).Contains(local_point);
 }