getInstalledRelatedApps: Add browser-side Mojo service (stub).

third_party/WebKit/public/platform/modules/installedapp/related_application.mojom

Index: third_party/WebKit/public/platform/modules/installedapp/related_application.mojom
diff --git a/third_party/WebKit/public/platform/modules/installedapp/related_application.mojom b/third_party/WebKit/public/platform/modules/installedapp/related_application.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..4f5f2f96e604e27777829f7c7270a5235a7c74bd
--- /dev/null
+++ b/third_party/WebKit/public/platform/modules/installedapp/related_application.mojom
@@ -0,0 +1,13 @@
+// Copyright 2017 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;
+
+// Represents a system application related to a particular web app.
+// See: https://www.w3.org/TR/appmanifest/#related_applications-member

[dcheng, 2017/03/13 07:15:08]

https://www.w3.org/TR/appmanifest/#dfn-application-object might be a more
helpful link (or in addition... I read the link here and had to click through
once or twice to find the application object definition, which I found more
useful)

[Matt Giuca, 2017/03/14 06:38:11]

Better! Thanks.

+struct RelatedApplication {
+  string platform;
+  string? url;

[dcheng, 2017/03/13 06:16:51]

Nit: please make this a mojo.common.mojom.Url.

[Matt Giuca, 2017/03/14 06:38:11]

OK, you're right, this should be a Url. But this is a pretty big refactor which
requires also converting the existing WebRelatedApplication's url field from
WebString to WebUrl (or else the URL gets re-parsed several times).

I did this change: https://codereview.chromium.org/2748023002

It touches too many unrelated things to do it in this CL, and also it broke my
Android implementation CL in a possibly-critical way ("class file for
org.chromium.url.mojom.Url not found" -- this might indicate a problem with
Mojo). I'd rather save this change for a follow-up and not try to do it now.

[dcheng, 2017/03/14 06:41:53]

Please add a TODO

[Matt Giuca, 2017/03/14 06:53:57]

Done.

+  string? id;
+};