[update_engine] Update to use not-hideously-old logging API from chrome

test_http_server.cc

 // 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.
 
 // This file implements a simple HTTP server. It can exhibit odd behavior
 // that's useful for testing. For example, it's useful to test that
 // the updater can continue a connection if it's dropped, or that it
 // handles very slow data transfers.
 
 // To use this, simply make an HTTP connection to localhost:port and
 // GET a url.
 
 #include <netinet/in.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #include <errno.h>
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <algorithm>
 #include <string>
 #include <vector>
-#include "chromeos/obsolete_logging.h"
+#include "base/logging.h"
 
 using std::min;
 using std::string;
 using std::vector;
 
 namespace chromeos_update_engine {
 
 struct HttpRequest {
   HttpRequest() : offset(0), return_code(200) {}
   string url;
@@ skipping 201 matching lines @@
     int client_fd = accept(listen_fd,
                            (struct sockaddr *) &client_addr,
                            &clilen);
     LOG(INFO) << "got past accept";
     if (client_fd < 0)
       LOG(FATAL) << "ERROR on accept";
     HandleConnection(client_fd);
   }
   return 0;
 }