Converts ios/web/net to ARC.

ios/web/net/web_http_protocol_handler_delegate.mm

 // Copyright 2014 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.
 
 #include "ios/web/net/web_http_protocol_handler_delegate.h"
 
 #import <Foundation/Foundation.h>
 
 #import "ios/web/public/url_scheme_util.h"
 #include "ios/web/public/web_client.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 bool IsAppSpecificScheme(NSURL* url) {
   NSString* scheme = [url scheme];
   if (![scheme length])
     return false;
   // Use the GURL implementation, but with a scheme-only URL to avoid
   // unnecessary parsing in GURL construction.
   GURL gurl([[scheme stringByAppendingString:@":"] UTF8String]);
   return web::GetWebClient()->IsAppSpecificURL(gurl);
@@ skipping 38 matching lines @@
          (IsAppSpecificScheme([request URL]) &&
           IsAppSpecificScheme([request mainDocumentURL]));
 }
 
 net::URLRequestContextGetter*
 WebHTTPProtocolHandlerDelegate::GetDefaultURLRequestContext() {
   return default_getter_.get();
 }
 
 }  // namespace web