AU: Support redirects.

libcurl_http_fetcher.h

 // Copyright (c) 2009 The Chromium OS 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 CHROMEOS_PLATFORM_UPDATE_ENGINE_LIBCURL_HTTP_FETCHER_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_LIBCURL_HTTP_FETCHER_H__
 
 #include <map>
 #include <string>
 #include <curl/curl.h>
 #include <glib.h>
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "update_engine/http_fetcher.h"
 
 // This is a concrete implementation of HttpFetcher that uses libcurl to do the
 // http work.
 
 namespace chromeos_update_engine {
 
 class LibcurlHttpFetcher : public HttpFetcher {
  public:
+  static const int kMaxRedirects = 10;
+
   LibcurlHttpFetcher()
       : curl_multi_handle_(NULL),
         curl_handle_(NULL),
         timeout_source_(NULL),
         transfer_in_progress_(false),
         retry_count_(0),
         retry_seconds_(60),
         idle_seconds_(1) {}
 
   // Cleans up all internal state. Does not notify delegate
@@ skipping 110 matching lines @@
 
   // Seconds to wait before asking libcurl to "perform".
   int idle_seconds_;
 
   DISALLOW_COPY_AND_ASSIGN(LibcurlHttpFetcher);
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_LIBCURL_HTTP_FETCHER_H__