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 3fb54d3d630c78122168737168a34aee8d8411e6..b8712b1ef1f40ec87ed5d966c1e433ddf18dc0e9 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;
 }