Functionality to allow blacklist and whitelist of custom schemes

content/public/browser/resource_dispatcher_host_delegate.cc

Index: content/public/browser/resource_dispatcher_host_delegate.cc
diff --git a/content/public/browser/resource_dispatcher_host_delegate.cc b/content/public/browser/resource_dispatcher_host_delegate.cc
index b30b6b468fd12126069a456f7c407c90cf34d3ef..f32274b341308a7b9e9a11cd8d6e9e0cef0971e0 100644
--- a/content/public/browser/resource_dispatcher_host_delegate.cc
+++ b/content/public/browser/resource_dispatcher_host_delegate.cc
@@ -49,7 +49,8 @@ bool ResourceDispatcherHostDelegate::HandleExternalProtocol(
     const ResourceRequestInfo::WebContentsGetter& web_contents_getter,
     bool is_main_frame,
     ui::PageTransition page_transition,
-    bool has_user_gesture) {
+    bool has_user_gesture,
+    bool is_whitelisted) {
   return true;
 }