Add better help information to quic_client and quic_server. Also,

net/tools/quic/quic_client.cc

Index: net/tools/quic/quic_client.cc
diff --git a/net/tools/quic/quic_client.cc b/net/tools/quic/quic_client.cc
index 741d24b9b074ceddcdd4b6ae11e75997aee7af4d..68cdf001796ed525cfe47651fde4dca293bbcef0 100644
--- a/net/tools/quic/quic_client.cc
+++ b/net/tools/quic/quic_client.cc
@@ -32,7 +32,8 @@ const int kEpollFlags = EPOLLIN | EPOLLOUT | EPOLLET;
 
 QuicClient::QuicClient(IPEndPoint server_address,
                        const string& server_hostname,
-                       const QuicVersion version)
+                       const QuicVersion version,
+                       bool print_response)
     : server_address_(server_address),
       server_hostname_(server_hostname),
       local_port_(0),
@@ -40,7 +41,8 @@ QuicClient::QuicClient(IPEndPoint server_address,
       initialized_(false),
       packets_dropped_(0),
       overflow_supported_(false),
-      version_(version) {
+      version_(version),
+      print_response_(print_response) {
   config_.SetDefaults();
 }
 
@@ -56,7 +58,8 @@ QuicClient::QuicClient(IPEndPoint server_address,
       initialized_(false),
       packets_dropped_(0),
       overflow_supported_(false),
-      version_(version) {
+      version_(version),
+      print_response_(false) {
 }
 
 QuicClient::~QuicClient() {
@@ -178,10 +181,12 @@ void QuicClient::Disconnect() {
 
 void QuicClient::SendRequestsAndWaitForResponse(
     const CommandLine::StringVector& args) {
-  for (uint32_t i = 0; i < args.size(); i++) {
+  for (size_t i = 0; i < args.size(); i++) {
     BalsaHeaders headers;
     headers.SetRequestFirstlineFromStringPieces("GET", args[i], "HTTP/1.1");
-    CreateReliableClientStream()->SendRequest(headers, "", true);
+    QuicReliableClientStream* stream = CreateReliableClientStream();
+    stream->SendRequest(headers, "", true);
+    stream->set_visitor(this);
   }
 
   while (WaitForEvents()) { }
@@ -233,6 +238,24 @@ void QuicClient::OnEvent(int fd, EpollEvent* event) {
   }
 }
 
+void QuicClient::OnClose(ReliableQuicStream* stream) {
+  if (!print_response_) {
+    return;
+  }
+
+  QuicReliableClientStream* client_stream =
+      static_cast<QuicReliableClientStream*>(stream);
+  const BalsaHeaders& headers = client_stream->headers();
+  printf("%s\n", headers.first_line().as_string().c_str());
+  for (BalsaHeaders::const_header_lines_iterator i =
+           headers.header_lines_begin();
+       i != headers.header_lines_end(); ++i) {
+    printf("%s: %s\n", i->first.as_string().c_str(),
+           i->second.as_string().c_str());
+  }
+  printf("%s\n", client_stream->data().c_str());
+}
+
 QuicPacketCreator::Options* QuicClient::options() {
   if (session() == NULL) {
     return NULL;