Block renderer-initiated main frame navigations to data URLs

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index b783df3bdd63ad83df54c5ef83fcb5d74ad293b0..89b06e32d04fe9edc7911c030c35dadd3b834306 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -371,6 +371,11 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
                                                 false);
   }
 
+  WebRuntimeFeatures::enableFeatureFromString(
+      "AllowContentInitiatedDataUrlNavigations",
+      base::FeatureList::IsEnabled(
+          features::kAllowContentInitiatedDataUrlNavigations));
+
   // Enable explicitly enabled features, and then disable explicitly disabled
   // ones.
   if (command_line.HasSwitch(switches::kEnableBlinkFeatures)) {