Create ChromeEarlGrey waitForWebViewContainingText.

ios/chrome/browser/autofill/form_input_egtest.mm

Index: ios/chrome/browser/autofill/form_input_egtest.mm
diff --git a/ios/chrome/browser/autofill/form_input_egtest.mm b/ios/chrome/browser/autofill/form_input_egtest.mm
index 4b426a02a95a096847c44827a95b4f2703b8be96..a829142894cdc2d1c66ba9f553e08c7eec7f3f05 100644
--- a/ios/chrome/browser/autofill/form_input_egtest.mm
+++ b/ios/chrome/browser/autofill/form_input_egtest.mm
@@ -87,10 +87,7 @@ void AssertElementIsFocused(const std::string& element_id) {
       "http://ios/testing/data/http_server_files/multi_field_form.html");
   [ChromeEarlGrey loadURL:URL];
 
-  id<GREYMatcher> webViewMatcher =
-      chrome_test_util::WebViewContainingText("hello!");
-  [[EarlGrey selectElementWithMatcher:webViewMatcher]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey waitForWebViewContainingText:"hello!"];
 
   // Opening the keyboard from a webview blocks EarlGrey's synchronization.
   [[GREYConfiguration sharedInstance]