Add an experimental permissions API for extensions.

chrome/test/data/extensions/api_test/permissions/optional_deny/background.html

+<script>
+
+var assertFalse = chrome.test.assertFalse;
+var assertTrue = chrome.test.assertTrue;
+var pass = chrome.test.callbackPass;
+
+var NO_TABS_PERMISSION =
+    "You do not have permission to use 'windows.getAll'.";
+
+chrome.test.runTests([
+  function denyRequest() {
+    chrome.permissions.request({apis: ['tabs']}, pass(function(granted) {
+      // They were not granted, and there should be no error.
+      assertFalse(granted);
+      assertTrue(chrome.extension.lastError === undefined);
+
+      // Make sure they weren't granted...
+      chrome.permissions.contains({apis: ['tabs']}, pass(function(result) {
+        assertFalse(result);
+      }));
+
+      try {
+        chrome.windows.getAll({populate: true}, function() {
+          assertTrue(false);

[Mihai Parparita -not on Chrome, 2011/07/20 22:03:43]

Ditto about using chrome.test.fail("Should not have tabs API permission").

[jstritar, 2011/07/22 19:21:55]

Done.

+        });
+      } catch (e) {
+        assertTrue(e.message.indexOf(NO_TABS_PERMISSION) == 0);
+      }
+    }));
+  }
+]);
+</script>