Create ChromeEarlGrey waitForWebViewContainingText.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <AVFoundation/AVFoundation.h>
 #import <EarlGrey/EarlGrey.h>
 #import <UIKit/UIKit.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/version_info/version_info.h"
 #import "ios/chrome/app/main_controller.h"
 #include "ios/chrome/browser/chrome_switches.h"
 #import "ios/chrome/browser/ui/browser_view_controller.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #include "ios/chrome/browser/ui/icons/chrome_icon.h"
 #include "ios/chrome/browser/ui/qr_scanner/camera_controller.h"
 #include "ios/chrome/browser/ui/qr_scanner/qr_scanner_view.h"
 #include "ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller.h"
 #include "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
 #include "ios/chrome/grit/ios_chromium_strings.h"
 #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"
 #include "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/http_server_util.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "ui/base/l10n/l10n_util.h"
 #import "ui/base/l10n/l10n_util_mac.h"
 
 using namespace chrome_test_util;
@@ skipping 232 matching lines @@
   MainController* mainController = chrome_test_util::GetMainController();
   return [[mainController browserViewInformation] currentBVC];
 }
 
 // Checks that the omnibox is visible and contains |text|.
 - (void)assertOmniboxIsVisibleWithText:(std::string)text {
   [[EarlGrey selectElementWithMatcher:OmniboxText(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|.
 - (void)assertModalOfClass:(Class)klass
              isPresentedBy:(UIViewController*)viewController {
   UIViewController* modal = [viewController presentedViewController];
   NSString* errorString = [NSString
       stringWithFormat:@"A modal of class %@ should be presented by %@.", klass,
                        [viewController class]];
   GREYAssertTrue(modal && [modal isKindOfClass:klass], errorString);
@@ skipping 481 matching lines @@
        toDisappearFromAbove:[self currentBVC]];
   [cameraControllerMock verify];
 
   // Optionally edit the text in the omnibox before pressing return.
   [self assertOmniboxIsVisibleWithText:result];
   if (editString != nil) {
     EditOmniboxTextAndTapKeyboardReturn(result, editString);
   } else {
     TapKeyboardReturnKeyInOmniboxWithText(result);
   }
-  [self assertTestURLIsLoaded:response];
+  [ChromeEarlGrey
+      waitForWebViewContainingText:base::SysUTF8ToNSString(response)];
 
   // Press the back button to get back to the NTP.
   TapButton(WebToolbarBackButton());
   [self assertModalOfClass:[QRScannerViewController class]
           isNotPresentedBy:[self currentBVC]];
 }
 
 // Test that the correct page is loaded if the scanner result is a URL.
 - (void)testReceivingQRScannerURLResult {
   [self doTestReceivingResult:_testURL.GetContent()
@@ skipping 18 matching lines @@
 // Test that the correct page is loaded if the scanner result is a search query
 // which is then manually edited.
 - (void)testReceivingQRScannerSearchQueryResultAndEditingTheQuery {
   [self swizzleWebToolbarControllerLoadGURLFromLocationBar:_testQueryEdited];
   [self doTestReceivingResult:kTestQuery
                      response:kTestQueryEditedResponse
                          edit:@"\bedited"];
 }
 
 @end