cc: 9patch: fix shadow scaling issue

ui/wm/core/shadow.cc

Index: ui/wm/core/shadow.cc
diff --git a/ui/wm/core/shadow.cc b/ui/wm/core/shadow.cc
index dc80187fc9e7cecf210d97d690f9d80aabb8fe6b..8d4806cbf052536d2f880ebdb31187c487624cc3 100644
--- a/ui/wm/core/shadow.cc
+++ b/ui/wm/core/shadow.cc
@@ -187,6 +187,8 @@ void Shadow::UpdateLayerBounds() {
       gfx::Rect(aperture_x, aperture_y,
                 image_size_.width() - aperture_x * 2,
                 image_size_.height() - aperture_y * 2));
+  shadow_layer_->UpdateNinePatchLayerBorder(
+      gfx::Rect(aperture_x, aperture_y, aperture_x * 2, aperture_y * 2));
   shadow_layer_->UpdateNinePatchOcclusion(
       content_bounds_ + gfx::Vector2d(interior_inset_, interior_inset_));
 }