Declarative resource hints go through mojo IPC to //content

third_party/WebKit/public/platform/resource_hints.mojom

Index: third_party/WebKit/public/platform/resource_hints.mojom
diff --git a/third_party/WebKit/public/platform/resource_hints.mojom b/third_party/WebKit/public/platform/resource_hints.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..fba9db7259c1addc221ced85002ce85396c3122c
--- /dev/null
+++ b/third_party/WebKit/public/platform/resource_hints.mojom
@@ -0,0 +1,16 @@
+// 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 ResourceHintsDispatcherHost 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 ResourceHintsDispatcherHost {

[yzshen1, 2016/06/08 17:40:54]

Naming: I don't know details about this feature, does it make sense to call it
something like ResourceHintsHandler/Reporter/etc? (consider this as an optional
comment.)

Also, the methods could be Preconnect and Preresolve.

[kinuko, 2016/06/09 07:09:19]

+1

[Charlie Harrison, 2016/06/10 14:20:00]

Done. Changed to ResourceHintsHandler. I used the "Dispatcher/DispatcherHost" to
align with some other renderer <=> browser naming schemes, but Handler is
simpler.

+  DispatchPreconnect(url.mojom.Url url, bool credentials_flag, uint8 num_connections);

[yzshen1, 2016/06/08 17:40:54]

nit: 80 char line length

[Charlie Harrison, 2016/06/10 14:20:00]

Done.

+  DispatchPreresolve(url.mojom.Url url);
+};