Declarative resource hints go through mojo IPC to //content

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";
+
+// The ResourceHintsHandler sends preconnect/preresolve requests based
+// on link tags/headers. See the corresponding interface in
+// content/public/resource_hints.h.

[kinuko, 2016/06/17 04:30:25]

Would be still nice to have a lightweight comment for each method, as this one
defines 'interface' of this service (and not all params are too obvious)

[Charlie Harrison, 2016/06/17 06:43:11]

Done.

+// TODO(csharrison): Extend this interface to include page scans and link hovers.

[kinuko, 2016/06/17 04:30:25]

nit: exceeds 80 cols?

[Charlie Harrison, 2016/06/17 06:43:11]

Done.

+interface ResourceHintsHandler {
+  Preconnect(url.mojom.Url url, bool credentials_flag, uint8 num_connections);
+  Preresolve(url.mojom.Url url);
+};