[sensors] Add Permission guard to the generic sensor apis.

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

Index: third_party/WebKit/LayoutTests/http/tests/permissions/chromium/resources/test-revoke.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/permissions/chromium/resources/test-revoke.js b/third_party/WebKit/LayoutTests/http/tests/permissions/chromium/resources/test-revoke.js
index d779cb06a4a38a1ddc724124cb5ed3a3069fb378..34aa026983165ddb9e001737a15f38236b58ead7 100644
--- a/third_party/WebKit/LayoutTests/http/tests/permissions/chromium/resources/test-revoke.js
+++ b/third_party/WebKit/LayoutTests/http/tests/permissions/chromium/resources/test-revoke.js
@@ -70,6 +70,21 @@ var tests = [
     }
 },
 {
+    test: async_test('Test sensors permission in ' + get_current_scope() + ' scope.'),
+    fn: function(callback) {
+      setPermission('sensors', 'granted', location.origin, location.origin).then(function() {
+          return navigator.permissions.revoke({name:'sensors'});
+      }).then(function(result) {
+          assert_true(result instanceof PermissionStatus);
+          assert_equals(result.state, DEFAULT_PERMISSION_STATE);
+          callback();
+      }).catch(function() {
+          assert_unreached('revoking sensors permission should not fail.');
+          callback();
+      });
+    }
+},
+{
     test: async_test('Test push permission in ' + get_current_scope() + ' scope.'),
     fn: function(callback) {
         setPermission('push-messaging', 'granted', location.origin, location.origin).then(function() {