Move FuzzedDataProvider to //base and expose to blink

net/http/http_proxy_client_socket_fuzzer.cc

 // Copyright 2016 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/http/http_proxy_client_socket.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
+#include "base/fuzzed_data_provider.h"
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "net/base/address_list.h"
 #include "net/base/auth.h"
-#include "net/base/fuzzed_data_provider.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/test_completion_callback.h"
 #include "net/http/http_auth_cache.h"
 #include "net/http/http_auth_handler_basic.h"
 #include "net/http/http_auth_handler_digest.h"
 #include "net/http/http_auth_handler_factory.h"
 #include "net/http/http_auth_scheme.h"
 #include "net/log/test_net_log.h"
 #include "net/socket/client_socket_handle.h"
 #include "net/socket/fuzzed_socket.h"
 #include "net/socket/next_proto.h"
 
 // Fuzzer for HttpProxyClientSocket only tests establishing a connection when
 // using the proxy as a tunnel.
 //
 // |data| is used to create a FuzzedSocket to fuzz reads and writes, see that
 // class for details.
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   // Use a test NetLog, to exercise logging code.
   net::TestNetLog test_net_log;
 
-  net::FuzzedDataProvider data_provider(data, size);
+  base::FuzzedDataProvider data_provider(data, size);
 
   net::TestCompletionCallback callback;
   std::unique_ptr<net::FuzzedSocket> fuzzed_socket(
       new net::FuzzedSocket(&data_provider, &test_net_log));
   CHECK_EQ(net::OK, fuzzed_socket->Connect(callback.callback()));
 
   std::unique_ptr<net::ClientSocketHandle> socket_handle(
       new net::ClientSocketHandle());
   socket_handle->SetSocket(std::move(fuzzed_socket));
 
@@ skipping 24 matching lines @@
   // Repeatedly try to log in with the same credentials.
   while (result == net::ERR_PROXY_AUTH_REQUESTED) {
     auth_controller->ResetAuth(net::AuthCredentials(
         base::ASCIIToUTF16("user"), base::ASCIIToUTF16("pass")));
     result = socket.RestartWithAuth(callback.callback());
     result = callback.GetResult(result);
   }
 
   return 0;
 }