Enable WebNavigationApiTest.UserAction

Bug: 662160
Change-Id: If252b4f8765eb70218f6c89d8794c05566700fbe
Reviewed-on: https://chromium-review.googlesource.com/600768Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: Nasko Oskov <nasko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491817}

chrome/browser/extensions/api/web_navigation/web_navigation_apitest.cc

@@ -503,13 +503,7 @@ IN_PROC_BROWSER_TEST_F(WebNavigationApiTest, FilteredTest) {
   ASSERT_TRUE(RunExtensionTest("webnavigation/filtered")) << message_;
 }
 
-// Flaky on Windows. See http://crbug.com/662160.
-#if defined(OS_WIN)
-#define MAYBE_UserAction DISABLED_UserAction
-#else
-#define MAYBE_UserAction UserAction
-#endif
-IN_PROC_BROWSER_TEST_F(WebNavigationApiTest, MAYBE_UserAction) {
+IN_PROC_BROWSER_TEST_F(WebNavigationApiTest, UserAction) {
   content::IsolateAllSitesForTesting(base::CommandLine::ForCurrentProcess());
   ASSERT_TRUE(StartEmbeddedTestServer());