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 a978544ea1a23cd37bb31c17139ab041c050053e..c234121f95e87468a1458478c9e38e3c9649e170 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -4715,6 +4715,12 @@ 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_)