Remove two notification browsertests related to infobars.

There's no special logic for this behavior in the Notifications
implementations that's not covered elsewhere. Given that the test
was timing out as well, let's remove them.

BUG=168976

Review URL: https://codereview.chromium.org/1136543004

Cr-Commit-Position: refs/heads/master@{#329397}

chrome/browser/notifications/notification_browsertest.cc

@@ -636,31 +636,6 @@ IN_PROC_BROWSER_TEST_F(
   EXPECT_EQ(0U, settings.size());
 }
 
-IN_PROC_BROWSER_TEST_F(NotificationsTest, TestExitBrowserWithInfobar) {
-  ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
-
-  // Exit the browser window, when the infobar appears.
-  ui_test_utils::NavigateToURL(browser(), GetTestPageURL());
-  ASSERT_TRUE(RequestPermissionAndWait(browser()));
-}
-
-// Times out. http://crbug.com/168976
-IN_PROC_BROWSER_TEST_F(NotificationsTest,
-                       DISABLED_TestCrashTabWithPermissionInfobar) {
-  ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
-
-  // Test crashing the tab with permission infobar doesn't crash Chrome.
-  ui_test_utils::NavigateToURLWithDisposition(
-      browser(),
-      embedded_test_server()->GetURL("/empty.html"),
-      NEW_BACKGROUND_TAB,
-      ui_test_utils::BROWSER_TEST_WAIT_FOR_TAB);
-  browser()->tab_strip_model()->ActivateTabAt(0, true);
-  ui_test_utils::NavigateToURL(browser(), GetTestPageURL());
-  ASSERT_TRUE(RequestPermissionAndWait(browser()));
-  CrashTab(browser(), 0);
-}
-
 IN_PROC_BROWSER_TEST_F(NotificationsTest, TestIncognitoNotification) {
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());