Create ChromeEarlGrey waitForWebViewContainingText.

ios/chrome/browser/ui/print/print_controller_egtest.mm

Index: ios/chrome/browser/ui/print/print_controller_egtest.mm
diff --git a/ios/chrome/browser/ui/print/print_controller_egtest.mm b/ios/chrome/browser/ui/print/print_controller_egtest.mm
index c5f7987dfff5db4cdf3b6cb92d63a51af9d7229b..d6244425e354a7072c2a85313f3dde87a5a5adce 100644
--- a/ios/chrome/browser/ui/print/print_controller_egtest.mm
+++ b/ios/chrome/browser/ui/print/print_controller_egtest.mm
@@ -6,9 +6,11 @@
 #import <UIKit/UIKit.h>
 #import <XCTest/XCTest.h>
 
+#include "base/strings/sys_string_conversions.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/chrome/test/app/navigation_test_util.h"
+#import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey_ui.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
@@ -51,10 +53,8 @@ const char kHTMLURL[] = "http://test";
   web::test::SetUpSimpleHttpServer(responses);
 
   chrome_test_util::LoadUrl(url);
-  id<GREYMatcher> response1Matcher =
-      chrome_test_util::WebViewContainingText(response);
-  [[EarlGrey selectElementWithMatcher:response1Matcher]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey
+      waitForWebViewContainingText:base::SysUTF8ToNSString(response)];
 
   [self printCurrentPage];
 }