Add better help information to quic_client and quic_server. Also,

net/tools/quic/quic_server_bin.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.
 //
 // A binary wrapper for QuicServer.  It listens forever on --port
 // (default 6121) until it's killed or ctrl-cd to death.
 
+#include <iostream>
+
 #include "base/at_exit.h"
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/base/ip_endpoint.h"
 #include "net/tools/quic/quic_in_memory_cache.h"
 #include "net/tools/quic/quic_server.h"
 
 // The port the quic server will listen on.
 
 int32 FLAGS_port = 6121;
 
 int main(int argc, char *argv[]) {
   CommandLine::Init(argc, argv);
   CommandLine* line = CommandLine::ForCurrentProcess();
+  if (line->HasSwitch("h") || line->HasSwitch("help")) {
+    const char* help_str =
+        "Usage: quic_server [options]\n"
+        "\n"
+        "Options:\n"
+        "-h, --help                  show this help message and exit\n"
+        "--port=<port>               specify the port to listen on\n"
+        "--quic_in_memory_cache_dir  directory containing response data\n"
+        "                            to load\n";
+    std::cout << help_str;
+    exit(0);
+  }
+
   if (line->HasSwitch("quic_in_memory_cache_dir")) {
     net::tools::FLAGS_quic_in_memory_cache_dir =
         line->GetSwitchValueASCII("quic_in_memory_cache_dir");
   }
 
   if (line->HasSwitch("port")) {
     int port;
     if (base::StringToInt(line->GetSwitchValueASCII("port"), &port)) {
       FLAGS_port = port;
     }
   }
 
   base::AtExitManager exit_manager;
 
   net::IPAddressNumber ip;
   CHECK(net::ParseIPLiteralToNumber("::", &ip));
 
   net::tools::QuicServer server;
 
   if (!server.Listen(net::IPEndPoint(ip, FLAGS_port))) {
     return 1;
   }
 
   while (1) {
     server.WaitForEvents();
   }
 
   return 0;
 }