Revert of Disable flaky ExperimentalAppWindowApiTest.SetIcon

extensions/browser/api/app_window/app_window_apitest.cc

Index: extensions/browser/api/app_window/app_window_apitest.cc
diff --git a/extensions/browser/api/app_window/app_window_apitest.cc b/extensions/browser/api/app_window/app_window_apitest.cc
index 2ad98868b87a80c1d9021bd4fd17c346dfc56f99..fff0454a6c4defa6b71041e1aead3708305c590d 100644
--- a/extensions/browser/api/app_window/app_window_apitest.cc
+++ b/extensions/browser/api/app_window/app_window_apitest.cc
@@ -62,8 +62,7 @@
 using ExperimentalAppWindowApiTest = ExperimentalPlatformAppBrowserTest;
 
 // Tests chrome.app.window.setIcon.
-// Flaky test crbug.com/716726
-IN_PROC_BROWSER_TEST_F(ExperimentalAppWindowApiTest, DISABLED_SetIcon) {
+IN_PROC_BROWSER_TEST_F(ExperimentalAppWindowApiTest, SetIcon) {
   std::unique_ptr<TestAppWindowRegistryObserver> test_observer(
       new TestAppWindowRegistryObserver(browser()->profile()));
   ExtensionTestMessageListener listener("ready", true);