Block renderer-initiated main frame navigations to data URLs

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index fbf545b8694f14fe1d2685c176186ad42e87ae5d..ebdb9309f7c3770715f1adb6b5716b092958725b 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -4712,6 +4712,12 @@ bool RenderFrameImpl::AllowWebGL(bool default_value) {
   return !blocked;
 }
 
+bool RenderFrameImpl::AllowContentInitiatedDataUrlNavigations(
+    const blink::WebURL& url) {
+  // Error pages can navigate to data URLs.
+  return url.GetString() == kUnreachableWebDataURL;
+}
+
 blink::WebScreenOrientationClient*
 RenderFrameImpl::GetWebScreenOrientationClient() {
   if (!screen_orientation_dispatcher_)