Create ChromeEarlGrey waitForWebViewContainingText.

ios/chrome/browser/web/stop_loading_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 <EarlGrey/EarlGrey.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/strings/sys_string_conversions.h"
 #include "base/time/time.h"
 #include "ios/chrome/browser/ui/ui_util.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"
 #import "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/http_server_util.h"
 #include "ios/web/public/test/response_providers/html_response_provider.h"
 #include "url/gurl.h"
 
 using chrome_test_util::ButtonWithAccessibilityLabelId;
-using chrome_test_util::WebViewContainingText;
 
 namespace {
 
 // Text appearing on the navigation test page.
 const char kPageText[] = "Navigation testing page";
 
 // Response provider that serves the page which never finishes loading.
 class InfinitePendingResponseProvider : public HtmlResponseProvider {
  public:
   explicit InfinitePendingResponseProvider(const GURL& url) : url_(url) {}
@@ skipping 63 matching lines @@
   if (IsIPadIdiom()) {
     // Disable EG synchronization so the framework does not wait until the tab
     // loading spinner becomes idle (which will not happen until the stop button
     // is tapped).
     [[GREYConfiguration sharedInstance]
             setValue:@NO
         forConfigKey:kGREYConfigKeySynchronizationEnabled];
   }
 
   // Wait until the page is half loaded.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageText)]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey
+      waitForWebViewContainingText:base::SysUTF8ToNSString(kPageText)];
 
   // On iPhone Stop/Reload button is a part of tools menu, so open it.
   if (!IsIPadIdiom()) {
     [ChromeEarlGreyUI openToolsMenu];
   }
 
   // Verify that stop button is visible and reload button is hidden.
   [[EarlGrey selectElementWithMatcher:chrome_test_util::StopButton()]
       assertWithMatcher:grey_sufficientlyVisible()];
   [[EarlGrey selectElementWithMatcher:chrome_test_util::ReloadButton()]
@@ skipping 13 matching lines @@
   if (!IsIPadIdiom()) {
     [ChromeEarlGreyUI openToolsMenu];
   }
   [[EarlGrey selectElementWithMatcher:chrome_test_util::StopButton()]
       assertWithMatcher:grey_notVisible()];
   [[EarlGrey selectElementWithMatcher:chrome_test_util::ReloadButton()]
       assertWithMatcher:grey_sufficientlyVisible()];
 }
 
 @end