ChromeWebView integration test for Incognito.

ios/web_view/test/web_view_test_util.mm

 // Copyright 2017 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 "ios/web_view/test/web_view_test_util.h"
 
 #import <ChromeWebView/ChromeWebView.h>
 
 #import "ios/testing/wait_util.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 using testing::WaitUntilConditionOrTimeout;
 
 namespace ios_web_view {
 namespace test {
 
+CWVWebView* CreateWebView(CWVWebViewConfiguration* configuration) {
+  return [[CWVWebView alloc] initWithFrame:UIScreen.mainScreen.bounds
+                             configuration:configuration];
+}
+
 CWVWebView* CreateWebView() {
-  return [[CWVWebView alloc]
-      initWithFrame:UIScreen.mainScreen.bounds
-      configuration:[CWVWebViewConfiguration defaultConfiguration]];
+  return CreateWebView([CWVWebViewConfiguration defaultConfiguration]);
 }
 
 bool LoadUrl(CWVWebView* web_view, NSURL* url) {
   [web_view loadRequest:[NSURLRequest requestWithURL:url]];
 
   return WaitForWebViewLoadCompletionOrTimeout(web_view);
 }
 
 bool TapWebViewElementWithId(CWVWebView* web_view, NSString* element_id) {
   // TODO(crbug.com/725524): Share this script with Chrome.
@@ skipping 41 matching lines @@
 }
 
 bool WaitForWebViewLoadCompletionOrTimeout(CWVWebView* web_view) {
   return WaitUntilConditionOrTimeout(testing::kWaitForPageLoadTimeout, ^{
     return !web_view.loading;
   });
 }
 
 }  // namespace test
 }  // namespace ios_web_view