[ios] Use +[ShellEarlGrey loadURL:] for page loading in EG tests.

ios/web/shell/test/pdf_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/test/ios/wait_util.h"
 #include "ios/testing/earl_grey/wait_util.h"
 #import "ios/web/public/test/earl_grey/web_view_matchers.h"
 #import "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/http_server_util.h"
-#include "ios/web/shell/test/app/navigation_test_util.h"
 #import "ios/web/shell/test/app/web_shell_test_util.h"
 #import "ios/web/shell/test/earl_grey/shell_base_test_case.h"
+#import "ios/web/shell/test/earl_grey/shell_earl_grey.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 // URL spec for test PDF page.
 const char kTestPDFURL[] =
     "http://ios/web/shell/test/http_server_files/testpage.pdf";
 
@@ skipping 21 matching lines @@
 
   return grey_allOf(
       webViewInWebState(web_state),
       [[GREYElementMatcherBlock alloc] initWithMatchesBlock:matches
                                            descriptionBlock:describe],
       nil);
 }
 
 }  // namespace
 
-using web::shell_test_util::LoadUrl;
 using web::test::HttpServer;
 
 // PDF test cases for the web shell.
 @interface PDFTestCase : ShellBaseTestCase
 @end
 
 @implementation PDFTestCase
 
 // Tests MIME type of the loaded PDF document.
 - (void)testMIMEType {
   web::test::SetUpFileBasedHttpServer();
-  LoadUrl(HttpServer::MakeUrl(kTestPDFURL));
+  [ShellEarlGrey loadURL:HttpServer::MakeUrl(kTestPDFURL)];
   [[EarlGrey selectElementWithMatcher:webViewWithPdf()]
       assertWithMatcher:grey_notNil()];
 }
 
 @end