Create ChromeEarlGrey waitForWebViewContainingText.

ios/chrome/browser/web/stop_loading_egtest.mm

Index: ios/chrome/browser/web/stop_loading_egtest.mm
diff --git a/ios/chrome/browser/web/stop_loading_egtest.mm b/ios/chrome/browser/web/stop_loading_egtest.mm
index 61c832ca6f8cc278541475e51a4fb1565f8987f4..dba1235d0823f12959dcf43dac168d5bc9e98bbb 100644
--- a/ios/chrome/browser/web/stop_loading_egtest.mm
+++ b/ios/chrome/browser/web/stop_loading_egtest.mm
@@ -6,9 +6,11 @@
 
 #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"
@@ -18,7 +20,6 @@
 #include "url/gurl.h"
 
 using chrome_test_util::ButtonWithAccessibilityLabelId;
-using chrome_test_util::WebViewContainingText;
 
 namespace {
 
@@ -102,8 +103,8 @@ class InfinitePendingResponseProvider : public HtmlResponseProvider {
   }
 
   // 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()) {