Restrict chrome.runtime.setUninstallURL to http(s)

chrome/test/data/extensions/api_test/runtime/uninstall_url/test.js

Index: chrome/test/data/extensions/api_test/runtime/uninstall_url/test.js
diff --git a/chrome/test/data/extensions/api_test/runtime/uninstall_url/test.js b/chrome/test/data/extensions/api_test/runtime/uninstall_url/test.js
index 5d42e56f4e14c739ed9649fc5320fee0779e5900..2d203b90c84d477d76b05883deb3da092256c746 100644
--- a/chrome/test/data/extensions/api_test/runtime/uninstall_url/test.js
+++ b/chrome/test/data/extensions/api_test/runtime/uninstall_url/test.js
@@ -28,5 +28,17 @@ chrome.test.runTests([
       }
       chrome.test.assertTrue(uninstalled);
     });
+  },
+  function setEmptyUrl() {
+    chrome.runtime.setUninstallURL('', function() {
+      chrome.test.assertNoLastError();
+      chrome.test.succeed();
+    });
+  },
+  function uninstallInvalidURLNonHttpOrHttps() {
+    chrome.runtime.setUninstallURL('chrome://newtab', function() {
+      chrome.test.assertLastError('Invalid URL: "chrome://newtab".');
+      chrome.test.succeed();
+    });
   }
 ]);