Cleanup ios_web_view integration tests.

ios/web_view/test/chrome_web_view_test.h

 // 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.
 
 #ifndef IOS_WEB_VIEW_TEST_CHROME_WEB_VIEW_TEST_H_
 #define IOS_WEB_VIEW_TEST_CHROME_WEB_VIEW_TEST_H_
 
 #include <memory>
 #include <string>
 
+#import "base/mac/scoped_nsobject.h"
 #include "testing/platform_test.h"
 
 namespace net {
 namespace test_server {
 class EmbeddedTestServer;
 }  // namespace test_server
 }  // namespace net
 
 @class CWVWebView;
 class GURL;
@@ skipping 23 matching lines @@
   // Loads |URL| in |web_view| and waits until the load completes. Asserts if
   // loading does not complete.
   void LoadUrl(CWVWebView* web_view, NSURL* url);
 
   // Waits until |web_view| stops loading. Asserts if loading does not complete.
   void WaitForPageLoadCompletion(CWVWebView* web_view);
 
   // PlatformTest methods.
   void SetUp() override;
 
+  // CWVWebView created with default configuration and frame equal to screen
+  // bounds.
+  base::scoped_nsobject<CWVWebView> web_view_;
+
   // Embedded server for handling requests sent to the URLs returned by the
   // GetURL* methods.
   std::unique_ptr<net::test_server::EmbeddedTestServer> test_server_;
 };
 
 }  // namespace ios_web_view
 
 #endif  // IOS_WEB_VIEW_TEST_CHROME_WEB_VIEW_TEST_H_