Functionality to allow blacklist and whitelist of custom schemes

content/public/browser/resource_dispatcher_host_delegate.h

Index: content/public/browser/resource_dispatcher_host_delegate.h
diff --git a/content/public/browser/resource_dispatcher_host_delegate.h b/content/public/browser/resource_dispatcher_host_delegate.h
index cb40ca14da46daced7ec040515c5a983ead7a70f..e33c7ddf98c9a8aeb879cdd54d04c72209e00740 100644
--- a/content/public/browser/resource_dispatcher_host_delegate.h
+++ b/content/public/browser/resource_dispatcher_host_delegate.h
@@ -73,14 +73,17 @@ class CONTENT_EXPORT ResourceDispatcherHostDelegate {
 
   // Launches the url for the given tab. Returns true if an attempt to handle
   // the url was made, e.g. by launching an app. Note that this does not
-  // guarantee that the app successfully handled it.
+  // guarantee that the app successfully handled it. Parameter |is_whitelisted|
+  // specifies whether |url| matches a whitelist pattern defined by user. In
+  // that case it will process the |url| without asking user permission.
   virtual bool HandleExternalProtocol(
       const GURL& url,
       int child_id,
       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);
 
   // Returns true if we should force the given resource to be downloaded.
   // Otherwise, the content layer decides.