[Mac][Material] Fixed the lock icon color

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 9bba1fe9c0878d1af456bf2c77d94c5d0bc5f1d5..843bc12124f476945bdb0edba9200f4fcb5cdaf6 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
@@ -728,7 +728,7 @@ void LocationBarViewMac::UpdateLocationIcon() {
   } else {
     vector_icon_id = omnibox_view_->GetVectorIcon();
     if (in_dark_mode) {
-      vector_icon_color = SK_ColorWHITE;
+      vector_icon_color = LocationBarDecoration::kMaterialDarkModeTextColor;
     } else {
       security_state::SecurityStateModel::SecurityLevel security_level =
           GetToolbarModel()->GetSecurityLevel(false);