Update from chromium https://crrev.com/304586

net/url_request/url_fetcher_impl.h

 // Copyright (c) 2012 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.
 
 // This file contains URLFetcher, a wrapper around URLRequest that handles
 // low-level details like thread safety, ref counting, and incremental buffer
 // reading.  This is useful for callers who simply want to get the data from a
 // URL and don't care about all the nitty-gritty details.
 //
 // NOTE(willchan): Only one "IO" thread is supported for URLFetcher.  This is a
@@ skipping 72 matching lines @@
   const URLRequestStatus& GetStatus() const override;
   int GetResponseCode() const override;
   const ResponseCookies& GetCookies() const override;
   void ReceivedContentWasMalformed() override;
   bool GetResponseAsString(std::string* out_response_string) const override;
   bool GetResponseAsFilePath(bool take_ownership,
                              base::FilePath* out_response_path) const override;
 
   static void CancelAll();
 
-  static void SetEnableInterceptionForTests(bool enabled);
   static void SetIgnoreCertificateRequests(bool ignored);
 
   // TODO(akalin): Make these private again once URLFetcher::Create()
   // is in net/.
 
   static URLFetcherFactory* factory();
 
   // Sets the factory used by the static method Create to create a URLFetcher.
   // URLFetcher does not take ownership of |factory|. A value of NULL results
   // in a URLFetcher being created directly.
@@ skipping 13 matching lines @@
   static int GetNumFetcherCores();
 
   const scoped_refptr<URLFetcherCore> core_;
 
   DISALLOW_COPY_AND_ASSIGN(URLFetcherImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_FETCHER_IMPL_H_