Reduce the amount of included header files. Vast change like in "Oh God! This...

net/url_request/url_request_unittest.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_UNITTEST_H_
 #define NET_URL_REQUEST_URL_REQUEST_UNITTEST_H_
 
 #include <stdlib.h>
 
 #include <sstream>
 #include <string>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/platform_thread.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/time.h"
 #include "base/waitable_event.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_network_layer.h"
 #include "net/url_request/url_request.h"
+#include "net/url_request/url_request_context.h"
 #include "net/proxy/proxy_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "googleurl/src/url_util.h"
 
 const int kHTTPDefaultPort = 1337;
 const int kFTPDefaultPort = 1338;
 
 const std::string kDefaultHostName("localhost");
 
 using base::TimeDelta;
@@ skipping 700 matching lines @@
     command_line->push_back("python");
     command_line->push_back(WideToUTF8(testserver_path));
     command_line->push_back(" -f ");
     command_line->push_back("--data-dir=" + WideToUTF8(test_data_directory));
     command_line->push_back("--port=" + port_str_);
   }
 #endif
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_UNITTEST_H_