DialogBrowserTest implementation to invoke Content settings bubble dialogs.

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 5c4a91e5b43a8b01b66e2755aa1c50d1582fbc0f..f8518917562b7a959abefe14f7b9b5b74d2f8d59 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
@@ -332,6 +332,15 @@ bool LocationBarViewMac::GetBookmarkStarVisibility() {
   return star_decoration_->IsVisible();
 }
 
+int LocationBarViewMac::ContentSettingImageModelCount() {
+  return 0;
+}
+
+ContentSettingImageModel* LocationBarViewMac::GetContentSettingImageModel(
+    size_t index) {
+  return nullptr;
+}
+
 void LocationBarViewMac::SetEditable(bool editable) {
   [field_ setEditable:editable ? YES : NO];
   UpdateBookmarkStarVisibility();