Some cases have matchers that wait, and assert with grey_nil(), which slows down tests. There are some cases where we have to do this, because waiting for the WebViewNotContainingText doesn't work since there is no webview:
[[EarlGrey selectElementWithMatcher:chrome_test_util::WebViewContainingText(	
                                           kContentToKeep)]	
       assertWithMatcher:grey_nil()];


We should create a ChromeEarlGrey helper to take care of this case.