Mark following tests as flaky due to an assertion failure:

chrome/browser/notifications/notifications_interactive_uitest.cc

Index: chrome/browser/notifications/notifications_interactive_uitest.cc
diff --git a/chrome/browser/notifications/notifications_interactive_uitest.cc b/chrome/browser/notifications/notifications_interactive_uitest.cc
index afd44d75751483d17ae8a809f0c1d83b6a769b85..43d905f725ccf553553276867d60f4aae7286640 100644
--- a/chrome/browser/notifications/notifications_interactive_uitest.cc
+++ b/chrome/browser/notifications/notifications_interactive_uitest.cc
@@ -17,7 +17,8 @@ class NotificationsPermissionTest : public UITest {
   }
 };
 
-TEST_F(NotificationsPermissionTest, TestUserGestureInfobar) {
+// Flaky, http://crbug.com/62311.
+TEST_F(NotificationsPermissionTest, FLAKY_TestUserGestureInfobar) {
   net::TestServer test_server(net::TestServer::TYPE_HTTP,
                               FilePath(FILE_PATH_LITERAL("chrome/test/data")));
   ASSERT_TRUE(test_server.Start());
@@ -43,7 +44,8 @@ TEST_F(NotificationsPermissionTest, TestUserGestureInfobar) {
   EXPECT_TRUE(tab->WaitForInfoBarCount(1));
 }
 
-TEST_F(NotificationsPermissionTest, TestNoUserGestureInfobar) {
+// Flaky, http://crbug.com/62311.
+TEST_F(NotificationsPermissionTest, FLAKY_TestNoUserGestureInfobar) {
   net::TestServer test_server(net::TestServer::TYPE_HTTP,
                               FilePath(FILE_PATH_LITERAL("chrome/test/data")));
   ASSERT_TRUE(test_server.Start());