sendNavigationHint with mojo

third_party/WebKit/public/platform/resource_hints.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module blink.mojom;
 
 import "url/mojo/url.mojom";
 
+enum NavigationHintType {
+  LINK_MOUSE_DOWN,
+  LINK_TAP_UNCONFIRMED,
+  LINK_TAP_DOWN,
+};
+
 // The ResourceHintsHandler sends preconnect/preresolve requests based
 // on link tags/headers. See the corresponding interface in
 // content/public/resource_hints.h.
 // TODO(csharrison): Extend this interface to include page scans and link
 // hovers.
 interface ResourceHintsHandler {
   // Issues |num_connections| preconnects for the given URL. This ensures that
   // at least |num_connections| are connected to the host in |url|. Note that
   // if sockets are already connected, the net stack will only connect up to
   // |num_connections|, so calling this multiple times is "safe". The
   // |credentials_flag| corresponds to the fetch API and its notion of
   // credentialed requests.
   Preconnect(url.mojom.Url url, bool credentials_flag, uint8 num_connections);
 
   // Resolves the given URL's host, so subsequent requests will hit the host
   // cache.
   Preresolve(url.mojom.Url url);
+
+  // Send a hint that a navigation to |url| is likely to happen.
+  SendNavigationHint(url.mojom.Url url, NavigationHintType type);
 };