Updates Zoom bubble layout and adds +/- buttons

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
index 0d693a66773346da82f3595210ee49631b66fe87..db3deadfa561678f2e6e5901f17dc3e91007407e 100644
--- a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
+++ b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
@@ -221,6 +221,11 @@ void LocationBarViewMac::UpdateBookmarkStarVisibility() {
   star_decoration_->SetVisible(IsStarEnabled());
 }
 
+void LocationBarViewMac::UpdateZoomViewVisibility() {
+  UpdateZoomDecoration(/*default_zoom_changed=*/false);
+  OnChanged();
+}
+
 void LocationBarViewMac::UpdateLocationBarVisibility(bool visible,
                                                      bool animate) {
   // Track the target location bar visibility to avoid redundant transitions