Disable flake LauncherAppBrowserTest.RefocusFilter.

Observed during sheriff shift: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20ChromeOS&testType=browser_tests&tests=LauncherAppBrowserTest.RefocusFilter

BUG=303231
TBR=stevenjb@chromium.org

Review URL: https://codereview.chromium.org/25650004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226495 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc

@@ -1104,7 +1104,8 @@ IN_PROC_BROWSER_TEST_F(LauncherAppBrowserTest, MultipleOwnedTabs) {
   EXPECT_EQ(tab_strip->GetActiveWebContents(), first_tab);
 }
 
-IN_PROC_BROWSER_TEST_F(LauncherAppBrowserTest, RefocusFilter) {
+// crbug.com/303231
+IN_PROC_BROWSER_TEST_F(LauncherAppBrowserTest, DISABLED_RefocusFilter) {
   TabStripModel* tab_strip = browser()->tab_strip_model();
   int tab_count = tab_strip->count();
   ash::LauncherID shortcut_id = CreateShortcut("app1");