Enable AutotestPrivateApiTest.AutotestPrivate

Enable the test after fix in https://crrev.com/c/2132683.

Bug: 1032993
Change-Id: Iec720cc1d61962b453a519624e43077f0c56b162
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2133882Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755990}

chrome/browser/chromeos/extensions/autotest_private/autotest_private_apitest.cc

@@ -71,8 +71,7 @@ class AutotestPrivateApiTest : public ExtensionApiTest {
   DISALLOW_COPY_AND_ASSIGN(AutotestPrivateApiTest);
 };
 
-// Flaky on linux-chromeos-rel (see https://crbug.com/1032993)
-IN_PROC_BROWSER_TEST_F(AutotestPrivateApiTest, DISABLED_AutotestPrivate) {
+IN_PROC_BROWSER_TEST_F(AutotestPrivateApiTest, AutotestPrivate) {
   ASSERT_TRUE(RunComponentExtensionTestWithArg("autotest_private", "default"))
       << message_;
 }