Move EarlGrey helper to check toolbar visibility into ChromeEarlGreyUI.

ios/chrome/browser/web/progress_indicator_egtest.mm

Index: ios/chrome/browser/web/progress_indicator_egtest.mm
diff --git a/ios/chrome/browser/web/progress_indicator_egtest.mm b/ios/chrome/browser/web/progress_indicator_egtest.mm
index cc2130e1ae30a2de27e3ae9d40c6f0c864f2b666..e2ef563e7fdd4d863b28ef09323a021d008ad46d 100644
--- a/ios/chrome/browser/web/progress_indicator_egtest.mm
+++ b/ios/chrome/browser/web/progress_indicator_egtest.mm
@@ -12,9 +12,9 @@
 #include "ios/chrome/test/app/navigation_test_util.h"
 #include "ios/chrome/test/app/web_view_interaction_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"
-#include "ios/chrome/test/earl_grey/chrome_util.h"
 #import "ios/testing/earl_grey/disabled_test_macros.h"
 #import "ios/third_party/material_components_ios/src/components/ProgressView/src/MaterialProgressView.h"
 #import "ios/web/public/test/http_server.h"
@@ -157,8 +157,7 @@ class InfinitePendingResponseProvider : public HtmlResponseProvider {
   [[EarlGrey selectElementWithMatcher:ProgressViewWithProgress(0.5)]
       assertWithMatcher:grey_sufficientlyVisible()];
 
-  // Verify toolbar visible.
-  chrome_test_util::AssertToolbarVisible();
+  [ChromeEarlGreyUI waitForToolbarVisible:YES];
 }
 
 // Tests that the progress indicator is shown and has expected progress value
@@ -197,8 +196,7 @@ class InfinitePendingResponseProvider : public HtmlResponseProvider {
   [[EarlGrey selectElementWithMatcher:ProgressViewWithProgress(0.5)]
       assertWithMatcher:grey_sufficientlyVisible()];
 
-  // Verify toolbar visible.
-  chrome_test_util::AssertToolbarVisible();
+  [ChromeEarlGreyUI waitForToolbarVisible:YES];
 }
 
 // Tests that the progress indicator disappears after form has been submitted.