Create ChromeEarlGrey waitForWebViewContainingText.

ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.mm

Index: ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.mm
diff --git a/ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.mm b/ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.mm
index 31aabe36b105c3c4bc0d41e5ab13b76fb8ad48ff..609623709c7adbc73645a8ba5f712533884ad746 100644
--- a/ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.mm
+++ b/ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.mm
@@ -25,6 +25,7 @@
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #import "ios/chrome/test/base/scoped_block_swizzler.h"
+#import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #include "ios/shared/chrome/browser/ui/omnibox/location_bar_delegate.h"
@@ -277,14 +278,6 @@ void TapKeyboardReturnKeyInOmniboxWithText(std::string text) {
       assertWithMatcher:grey_notNil()];
 }
 
-// Checks that the page that is currently loaded contains the |response|.
-- (void)assertTestURLIsLoaded:(std::string)response {
-  id<GREYMatcher> testURLResponseMatcher =
-      chrome_test_util::WebViewContainingText(response);
-  [[EarlGrey selectElementWithMatcher:testURLResponseMatcher]
-      assertWithMatcher:grey_notNil()];
-}
-
 #pragma mark helpers for dialogs
 
 // Checks that the modal presented by |viewController| is of class |klass|.
@@ -786,7 +779,8 @@ void TapKeyboardReturnKeyInOmniboxWithText(std::string text) {
   } else {
     TapKeyboardReturnKeyInOmniboxWithText(result);
   }
-  [self assertTestURLIsLoaded:response];
+  [ChromeEarlGrey
+      waitForWebViewContainingText:base::SysUTF8ToNSString(response)];
 
   // Press the back button to get back to the NTP.
   TapButton(WebToolbarBackButton());