Track Deep Linking vs. Credential Sharing in assetlinks.json (#152)

* updated /.well-known/assetlinks.json parsing

* updated /.well-known/assetlinks.json parsing and test URLs

* Update .markdown-lint.yml

* Update pull_request_template.md

* Update pull_request_template.md

* Update wpt-test.yml

---------

Co-authored-by: Barry Pollard <[email protected]>
Co-authored-by: Barry Pollard <[email protected]>

Author: tsunoyu

dist/well-known.js

@@ -81,7 +81,23 @@ function parseResponseWithRedirects(url, parser) {
 
 return Promise.all([
   // ecommerce
-  parseResponse('/.well-known/assetlinks.json'),
+  parseResponse('/.well-known/assetlinks.json', r => {
+    return r.json().then(data => {
+      let hasDeepLinking = false;
+      let hasCredentialSharing = false;
+      data.forEach(statement => {
+        if (statement.relation === 'delegate_permission/common.handle_all_urls') {
+          hasDeepLinking = true;
+        } else if (statement.relation === 'delegate_permission/common.get_login_creds') {
+          hasCredentialSharing = true;
+        }
+      });
+      return {
+        deep_linking: hasDeepLinking,
+        credential_sharing: hasCredentialSharing
+      };
+    });
+  }),
   parseResponse('/.well-known/apple-app-site-association'),
   // privacy sandbox
   parseResponse('/.well-known/related-website-set.json'), //Related Website Set