Move EarlGrey helper to check toolbar visibility into ChromeEarlGreyUI.

ios/chrome/browser/context_menu/context_menu_egtest.mm

Index: ios/chrome/browser/context_menu/context_menu_egtest.mm
diff --git a/ios/chrome/browser/context_menu/context_menu_egtest.mm b/ios/chrome/browser/context_menu/context_menu_egtest.mm
index 923a41ed8126b9f97ce4a1d10439a39cdcad8989..993ebfbae2b35c0dc0e76b5e720c5149b3380eb5 100644
--- a/ios/chrome/browser/context_menu/context_menu_egtest.mm
+++ b/ios/chrome/browser/context_menu/context_menu_egtest.mm
@@ -16,9 +16,9 @@
 #import "ios/chrome/test/earl_grey/chrome_actions.h"
 #import "ios/chrome/test/earl_grey/chrome_assertions.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"
-#include "ios/chrome/test/earl_grey/chrome_util.h"
 #import "ios/testing/wait_util.h"
 #import "ios/web/public/test/earl_grey/web_view_matchers.h"
 #import "ios/web/public/test/http_server.h"
@@ -241,7 +241,7 @@ void SelectTabAtIndexInCurrentMode(NSUInteger index) {
       selectElementWithMatcher:WebViewScrollView(
                                    chrome_test_util::GetCurrentWebState())]
       performAction:grey_swipeFastInDirection(kGREYDirectionDown)];
-  chrome_test_util::AssertToolbarVisible();
+  [ChromeEarlGreyUI waitForToolbarVisible:YES];
 
   SelectTabAtIndexInCurrentMode(1U);