blink: permissions: cleanup and add tests for revoke

LayoutTests/http/tests/permissions/chromium/resources/test-revoke.js

+if (self.importScripts) {
+    importScripts('../../resources/helpers.js');
+    importScripts('testrunner-helpers.js');
+
+    if (get_current_scope() == 'ServiceWorker')
+        importScripts('../../../serviceworker/resources/worker-testharness.js');
+    else
+        importScripts('../../../resources/testharness.js');
+}
+
+tests = [

[mlamouri (slow - plz ping), 2015/07/21 10:53:29]

var tests

[Lalit Maganti, 2015/07/21 16:10:30]

Done.

+{
+    test: async_test('Test PermissionDescription WebIDL rules in ' + get_current_scope() + ' scope.'),
+    fn: function(callback) {
+        // Revoking a random permission name should fail.
+        navigator.permissions.revoke({name:'foobar'}).then(function(result) {
+            assert_unreached('revocing a random permission should fail');

[mlamouri (slow - plz ping), 2015/07/21 10:53:29]

nit: revoking

[Lalit Maganti, 2015/07/21 16:10:30]

Done.

+        }, function(error) {
+            assert_equals(error.name, 'TypeError');
+
+            // Querying a permission without a name should fail.
+            return navigator.permissions.query({});
+        }).then(function(result) {
+            assert_unreached('revoking a permission without a name should fail');
+        }, function(error) {
+            assert_equals(error.name, 'TypeError');
+            callback();
+        });
+    }
+},
+{
+    test: async_test('Test geolocation permission in ' + get_current_scope() + ' scope.'),
+    fn: function(callback) {
+      setPermission('geolocation', 'granted', location.origin, location.origin).then(function() {
+          navigator.permissions.revoke({name:'geolocation'}).then(function(result) {
+              assert_true(result instanceof PermissionStatus);
+              assert_equals(result.status, 'denied');

[mlamouri (slow - plz ping), 2015/07/21 10:53:29]

Could you use .state instead of .status.
Also, could you have:
var DEFAULT_PERMISSION_STATE = 'denied';
at the top of the file and use that instead of 'denied'. Outside of the test
runner, it would be 'prompt' for example.

[Lalit Maganti, 2015/07/21 16:10:30]

Done.

+              callback();
+          }).catch(function() {
+              assert_unreached('revoking geolocation permission should not fail.')
+          });
+      });
+    }
+},
+{
+    test: async_test('Test midi permission in ' + get_current_scope() + ' scope.'),
+    fn: function(callback) {
+        setPermission('midi-sysex', 'granted', location.origin, location.origin).then(function() {
+            navigator.permissions.revoke({name:'geolocation'}).then(function(result) {

[mlamouri (slow - plz ping), 2015/07/21 10:53:29]

You might want to revoke 'midi-sysex' ;)

[Lalit Maganti, 2015/07/21 16:10:30]

Revoke actually expects 'midi' but done.

+                assert_true(result instanceof PermissionStatus);
+                assert_equals(result.status, 'denied');
+                callback();
+            }).catch(function() {
+                assert_unreached('revoking geolocation permission should not fail.')
+            });
+        });
+    }
+},
+{
+    test: async_test('Test push permission in ' + get_current_scope() + ' scope.'),
+    fn: function(callback) {
+        setPermission('push-messaging', 'granted', location.origin, location.origin).then(function() {
+            navigator.permissions.revoke({name:'push'}).catch(function(e) {
+                // By default, the permission query is rejected if "userVisibleOnly" option
+                // isn't set or set to true.
+                assert_equals(e.name, "NotSupportedError");
+
+                // Test for userVisibleOnly=false.
+                return navigator.permissions.revoke({name:'push', userVisibleOnly: false});
+            }).catch(function(e) {
+                // By default, the permission query is rejected if "userVisibleOnly" option
+                // isn't set or set to true.
+                assert_equals(e.name, "NotSupportedError");
+
+                // Test for userVisibleOnly=true.
+                return navigator.permissions.revoke({name:'push', userVisibleOnly: true});
+            }).then(function(result) {
+                assert_true(result instanceof PermissionStatus);
+                assert_equals(result.status, 'denied');
+                callback();
+            }).catch(function() {
+                assert_unreached('querying push permission should not fail.')
+            });
+        });
+    }
+},
+{
+    test: async_test('Test notifications permission in ' + get_current_scope() + ' scope.'),
+    fn: function(callback) {
+        setPermission('notifications', 'granted', location.origin, location.origin).then(function() {
+            navigator.permissions.revoke({name:'notifications'}).then(function(result) {
+                assert_true(result instanceof PermissionStatus);
+                assert_equals(result.status, 'denied');
+                callback();
+            }).catch(function() {
+                assert_unreached('querying notifications permission should not fail.')
+            });
+        });
+    }
+}];
+
+function runTest(i) {
+  tests[i].test.step(function() {
+      tests[i].fn(function() {
+          tests[i].test.done();
+          if (i + 1 < tests.length) {
+              runTest(i + 1);
+          } else {
+              done();

[mlamouri (slow - plz ping), 2015/07/21 10:53:29]

In other tests done() is run when the test file is loaded. Why is that run at
the end?

[Lalit Maganti, 2015/07/21 16:10:30]

As discussed offline.

+          }
+      });
+  });
+}
+runTest(0);