Have Notifications appear over docked windows

ash/shelf/shelf_layout_manager.cc

Index: ash/shelf/shelf_layout_manager.cc
diff --git a/ash/shelf/shelf_layout_manager.cc b/ash/shelf/shelf_layout_manager.cc
index 5eded79e0b05f2cbdc3e1c9bd0db09dd27d73b20..286ab4f65b14547a9de6954da3c8c1162ab84052 100644
--- a/ash/shelf/shelf_layout_manager.cc
+++ b/ash/shelf/shelf_layout_manager.cc
@@ -858,6 +858,9 @@ void ShelfLayoutManager::CalculateTargetBounds(
       gfx::Rect(0, 0,
                 shelf_width - status_size.width(),
                 target_bounds->shelf_bounds_in_root.height()));
+
+  non_shelf_bounds_in_root_ = available_bounds;
+  non_shelf_bounds_in_root_.Subtract(target_bounds->shelf_bounds_in_root);
 }
 
 void ShelfLayoutManager::UpdateTargetBoundsForGesture(