Allow app banners to trigger on 0 engagement.

chrome/browser/banners/app_banner_settings_helper.cc

Index: chrome/browser/banners/app_banner_settings_helper.cc
diff --git a/chrome/browser/banners/app_banner_settings_helper.cc b/chrome/browser/banners/app_banner_settings_helper.cc
index 2dfaf0ce67126a7e444a46a863cfeea426f94fbe..75e0f03c7c05edb79d151405ab9ac7ad85fc98aa 100644
--- a/chrome/browser/banners/app_banner_settings_helper.cc
+++ b/chrome/browser/banners/app_banner_settings_helper.cc
@@ -147,7 +147,7 @@ void UpdateSiteEngagementToTrigger() {
     double total_engagement = -1;
 
     if (base::StringToDouble(total_param, &total_engagement) &&
-        total_engagement > 0) {
+        total_engagement >= 0) {
       AppBannerSettingsHelper::SetTotalEngagementToTrigger(total_engagement);
     }
   }