Move base::FreeDeleter into its own header.

net/proxy/dhcp_proxy_script_adapter_fetcher_win.cc

 // 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.
 
 #include "net/proxy/dhcp_proxy_script_adapter_fetcher_win.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
+#include "base/memory/free_deleter.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/task_runner.h"
 #include "base/time/time.h"
 #include "net/base/net_errors.h"
 #include "net/proxy/dhcpcsvc_init_win.h"
 #include "net/proxy/proxy_script_fetcher_impl.h"
 #include "net/url_request/url_request_context.h"
 
 #include <windows.h>
@@ skipping 262 matching lines @@
   // first null in case of embedded NULLs; this is the outer
   // constructor that takes the result of c_str() on the inner.  If
   // the server is giving us back a buffer with embedded NULLs,
   // something is broken anyway.  Finally, trim trailing whitespace.
   std::string result(std::string(data, count_bytes).c_str());
   base::TrimWhitespaceASCII(result, base::TRIM_TRAILING, &result);
   return result;
 }
 
 }  // namespace net