WebShare: Introduce web-share feature policy

share() requests fail with a rejected promise if the 'web-share' feature is not enabled. We define 'self' as the default feature policy for web-share. The spec has been updated w3c/web-share#166 Intent to Ship https://groups.google.com/a/chromium.org/g/blink-dev/c/fgme9KOd8CU/m/TCYPKQAXAwAJ Bug: 1079104 Change-Id: Id4030448a54589eddb45185cbd6fd8970aee34c3
web-platform-tests · Jul 18, 2020 · d8e1b3c · d8e1b3c
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diff --git a/web-share/disabled-by-feature-policy.https.sub.html b/web-share/disabled-by-feature-policy.https.sub.html
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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>WebShare Test: Can be disabled by feature policy</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/resources/testdriver.js"></script>
+    <script src="/resources/testdriver-vendor.js"></script>
+  </head>
+  <body>
+    <script>
+      promise_test(async t => {
+        await test_driver.bless("web share");
+
+        await promise_rejects_dom(t, "NotAllowedError", navigator.share({title: 'the title', text: 'the message'}));
+      }, "share can be disabled by feature policy");
+    </script>
+  </body>
+</html>
diff --git a/web-share/disabled-by-feature-policy.https.sub.html.headers b/web-share/disabled-by-feature-policy.https.sub.html.headers
@@ -0,0 +1 @@
+Feature-Policy: web-share 'none'