[ObjC ARC] Converts ios/web:web to ARC.

ios/web/web_state/ui/wk_web_view_configuration_provider_unittest.mm

 // Copyright 2015 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/web_state/ui/wk_web_view_configuration_provider.h"
 
 #import <WebKit/WebKit.h>
 
 #import "base/ios/weak_nsobject.h"
+#import "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "ios/web/public/test/fakes/test_browser_state.h"
 #include "ios/web/public/test/scoped_testing_web_client.h"
 #import "ios/web/public/web_client.h"
 #import "ios/web/web_state/js/page_script_util.h"
 #import "ios/web/web_state/ui/crw_wk_script_message_router.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 
@@ skipping 118 matching lines @@
   NSArray* scripts = config.userContentController.userScripts;
   EXPECT_EQ(1U, scripts.count);
   NSString* early_script = GetEarlyPageScript(&browser_state_);
   // |earlyScript| is a substring of |userScripts|. The latter wraps the
   // former with "if (!injected)" check to avoid double injections.
   EXPECT_LT(0U, [[scripts[0] source] rangeOfString:early_script].length);
 }
 
 }  // namespace
 }  // namespace web