Update from https://crrev.com/304121

net/socket_stream/socket_stream.cc

Index: net/socket_stream/socket_stream.cc
diff --git a/net/socket_stream/socket_stream.cc b/net/socket_stream/socket_stream.cc
deleted file mode 100644
index 422d61d45203c324fd48ed381b58dd34a3e2fd95..0000000000000000000000000000000000000000
--- a/net/socket_stream/socket_stream.cc
+++ /dev/null
@@ -1,1353 +0,0 @@
-// 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.
-//
-// TODO(ukai): code is similar with http_network_transaction.cc.  We should
-//   think about ways to share code, if possible.
-
-#include "net/socket_stream/socket_stream.h"
-
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/compiler_specific.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-#include "base/strings/string_util.h"
-#include "base/strings/stringprintf.h"
-#include "base/strings/utf_string_conversions.h"
-#include "net/base/auth.h"
-#include "net/base/io_buffer.h"
-#include "net/base/load_flags.h"
-#include "net/base/net_errors.h"
-#include "net/base/net_util.h"
-#include "net/dns/host_resolver.h"
-#include "net/http/http_auth_controller.h"
-#include "net/http/http_network_session.h"
-#include "net/http/http_request_headers.h"
-#include "net/http/http_request_info.h"
-#include "net/http/http_response_headers.h"
-#include "net/http/http_stream_factory.h"
-#include "net/http/http_transaction_factory.h"
-#include "net/http/http_util.h"
-#include "net/socket/client_socket_factory.h"
-#include "net/socket/client_socket_handle.h"
-#include "net/socket/socks5_client_socket.h"
-#include "net/socket/socks_client_socket.h"
-#include "net/socket/ssl_client_socket.h"
-#include "net/socket/tcp_client_socket.h"
-#include "net/socket_stream/socket_stream_metrics.h"
-#include "net/ssl/ssl_cert_request_info.h"
-#include "net/ssl/ssl_info.h"
-#include "net/url_request/url_request.h"
-#include "net/url_request/url_request_context.h"
-
-static const int kMaxPendingSendAllowed = 32768;  // 32 kilobytes.
-static const int kReadBufferSize = 4096;
-
-namespace net {
-
-int SocketStream::Delegate::OnStartOpenConnection(
-    SocketStream* socket, const CompletionCallback& callback) {
-  return OK;
-}
-
-void SocketStream::Delegate::OnAuthRequired(SocketStream* socket,
-                                            AuthChallengeInfo* auth_info) {
-  // By default, no credential is available and close the connection.
-  socket->Close();
-}
-
-void SocketStream::Delegate::OnSSLCertificateError(
-    SocketStream* socket,
-    const SSLInfo& ssl_info,
-    bool fatal) {
-  socket->CancelWithSSLError(ssl_info);
-}
-
-bool SocketStream::Delegate::CanGetCookies(SocketStream* socket,
-                                           const GURL& url) {
-  return true;
-}
-
-bool SocketStream::Delegate::CanSetCookie(SocketStream* request,
-                                          const GURL& url,
-                                          const std::string& cookie_line,
-                                          CookieOptions* options) {
-  return true;
-}
-
-SocketStream::ResponseHeaders::ResponseHeaders() : IOBuffer() {}
-
-void SocketStream::ResponseHeaders::Realloc(size_t new_size) {
-  headers_.reset(static_cast<char*>(realloc(headers_.release(), new_size)));
-}
-
-SocketStream::ResponseHeaders::~ResponseHeaders() { data_ = NULL; }
-
-SocketStream::SocketStream(const GURL& url, Delegate* delegate,
-                           URLRequestContext* context,
-                           CookieStore* cookie_store)
-    : delegate_(delegate),
-      url_(url),
-      max_pending_send_allowed_(kMaxPendingSendAllowed),
-      context_(context),
-      next_state_(STATE_NONE),
-      factory_(ClientSocketFactory::GetDefaultFactory()),
-      proxy_mode_(kDirectConnection),
-      proxy_url_(url),
-      pac_request_(NULL),
-      connection_(new ClientSocketHandle),
-      privacy_mode_(PRIVACY_MODE_DISABLED),
-      // Unretained() is required; without it, Bind() creates a circular
-      // dependency and the SocketStream object will not be freed.
-      io_callback_(base::Bind(&SocketStream::OnIOCompleted,
-                              base::Unretained(this))),
-      read_buf_(NULL),
-      current_write_buf_(NULL),
-      waiting_for_write_completion_(false),
-      closing_(false),
-      server_closed_(false),
-      metrics_(new SocketStreamMetrics(url)),
-      cookie_store_(cookie_store) {
-  DCHECK(base::MessageLoop::current())
-      << "The current base::MessageLoop must exist";
-  DCHECK(base::MessageLoopForIO::IsCurrent())
-      << "The current base::MessageLoop must be TYPE_IO";
-  DCHECK(delegate_);
-
-  if (context_) {
-    if (!cookie_store_.get())
-      cookie_store_ = context_->cookie_store();
-
-    net_log_ = BoundNetLog::Make(
-        context->net_log(),
-        NetLog::SOURCE_SOCKET_STREAM);
-
-    net_log_.BeginEvent(NetLog::TYPE_REQUEST_ALIVE);
-  }
-}
-
-SocketStream::UserData* SocketStream::GetUserData(
-    const void* key) const {
-  UserDataMap::const_iterator found = user_data_.find(key);
-  if (found != user_data_.end())
-    return found->second.get();
-  return NULL;
-}
-
-void SocketStream::SetUserData(const void* key, UserData* data) {
-  user_data_[key] = linked_ptr<UserData>(data);
-}
-
-bool SocketStream::is_secure() const {
-  return url_.SchemeIs("wss");
-}
-
-void SocketStream::DetachContext() {
-  if (!context_)
-    return;
-
-  if (pac_request_) {
-    context_->proxy_service()->CancelPacRequest(pac_request_);
-    pac_request_ = NULL;
-  }
-
-  net_log_.EndEvent(NetLog::TYPE_REQUEST_ALIVE);
-  net_log_ = BoundNetLog();
-
-  context_ = NULL;
-  cookie_store_ = NULL;
-}
-
-void SocketStream::CheckPrivacyMode() {
-  if (context_ && context_->network_delegate()) {
-    bool enable = context_->network_delegate()->CanEnablePrivacyMode(url_,
-                                                                     url_);
-    privacy_mode_ = enable ? PRIVACY_MODE_ENABLED : PRIVACY_MODE_DISABLED;
-    // Disable Channel ID if privacy mode is enabled.
-    if (enable)
-      server_ssl_config_.channel_id_enabled = false;
-  }
-}
-
-void SocketStream::Connect() {
-  DCHECK(base::MessageLoop::current())
-      << "The current base::MessageLoop must exist";
-  DCHECK(base::MessageLoopForIO::IsCurrent())
-      << "The current base::MessageLoop must be TYPE_IO";
-  if (context_) {
-    context_->ssl_config_service()->GetSSLConfig(&server_ssl_config_);
-    proxy_ssl_config_ = server_ssl_config_;
-  }
-  CheckPrivacyMode();
-
-  DCHECK_EQ(next_state_, STATE_NONE);
-
-  AddRef();  // Released in Finish()
-  // Open a connection asynchronously, so that delegate won't be called
-  // back before returning Connect().
-  next_state_ = STATE_BEFORE_CONNECT;
-  net_log_.BeginEvent(
-      NetLog::TYPE_SOCKET_STREAM_CONNECT,
-      NetLog::StringCallback("url", &url_.possibly_invalid_spec()));
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE, base::Bind(&SocketStream::DoLoop, this, OK));
-}
-
-size_t SocketStream::GetTotalSizeOfPendingWriteBufs() const {
-  size_t total_size = 0;
-  for (PendingDataQueue::const_iterator iter = pending_write_bufs_.begin();
-       iter != pending_write_bufs_.end();
-       ++iter)
-    total_size += (*iter)->size();
-  return total_size;
-}
-
-bool SocketStream::SendData(const char* data, int len) {
-  DCHECK(base::MessageLoop::current())
-      << "The current base::MessageLoop must exist";
-  DCHECK(base::MessageLoopForIO::IsCurrent())
-      << "The current base::MessageLoop must be TYPE_IO";
-  DCHECK_GT(len, 0);
-
-  if (!connection_->socket() ||
-      !connection_->socket()->IsConnected() || next_state_ == STATE_NONE) {
-    return false;
-  }
-
-  int total_buffered_bytes = len;
-  if (current_write_buf_.get()) {
-    // Since
-    // - the purpose of this check is to limit the amount of buffer used by
-    //   this instance.
-    // - the DrainableIOBuffer doesn't release consumed memory.
-    // we need to use not BytesRemaining() but size() here.
-    total_buffered_bytes += current_write_buf_->size();
-  }
-  total_buffered_bytes += GetTotalSizeOfPendingWriteBufs();
-  if (total_buffered_bytes > max_pending_send_allowed_)
-    return false;
-
-  // TODO(tyoshino): Split data into smaller chunks e.g. 8KiB to free consumed
-  // buffer progressively
-  pending_write_bufs_.push_back(make_scoped_refptr(
-      new IOBufferWithSize(len)));
-  memcpy(pending_write_bufs_.back()->data(), data, len);
-
-  // If current_write_buf_ is not NULL, it means that a) there's ongoing write
-  // operation or b) the connection is being closed. If a), the buffer we just
-  // pushed will be automatically handled when the completion callback runs
-  // the loop, and therefore we don't need to enqueue DoLoop(). If b), it's ok
-  // to do nothing. If current_write_buf_ is NULL, to make sure DoLoop() is
-  // ran soon, enequeue it.
-  if (!current_write_buf_.get()) {
-    // Send pending data asynchronously, so that delegate won't be called
-    // back before returning from SendData().
-    base::MessageLoop::current()->PostTask(
-        FROM_HERE, base::Bind(&SocketStream::DoLoop, this, OK));
-  }
-
-  return true;
-}
-
-void SocketStream::Close() {
-  DCHECK(base::MessageLoop::current())
-      << "The current base::MessageLoop must exist";
-  DCHECK(base::MessageLoopForIO::IsCurrent())
-      << "The current base::MessageLoop must be TYPE_IO";
-  // If next_state_ is STATE_NONE, the socket was not opened, or already
-  // closed.  So, return immediately.
-  // Otherwise, it might call Finish() more than once, so breaks balance
-  // of AddRef() and Release() in Connect() and Finish(), respectively.
-  if (next_state_ == STATE_NONE)
-    return;
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE, base::Bind(&SocketStream::DoClose, this));
-}
-
-void SocketStream::RestartWithAuth(const AuthCredentials& credentials) {
-  DCHECK(base::MessageLoop::current())
-      << "The current base::MessageLoop must exist";
-  DCHECK(base::MessageLoopForIO::IsCurrent())
-      << "The current base::MessageLoop must be TYPE_IO";
-  DCHECK(proxy_auth_controller_.get());
-  if (!connection_->socket()) {
-    DVLOG(1) << "Socket is closed before restarting with auth.";
-    return;
-  }
-
-  proxy_auth_controller_->ResetAuth(credentials);
-
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE, base::Bind(&SocketStream::DoRestartWithAuth, this));
-}
-
-void SocketStream::DetachDelegate() {
-  if (!delegate_)
-    return;
-  delegate_ = NULL;
-  // Prevent the rest of the function from executing if we are being called from
-  // within Finish().
-  if (next_state_ == STATE_NONE)
-    return;
-  net_log_.AddEvent(NetLog::TYPE_CANCELLED);
-  // We don't need to send pending data when client detach the delegate.
-  pending_write_bufs_.clear();
-  Close();
-}
-
-const ProxyServer& SocketStream::proxy_server() const {
-  return proxy_info_.proxy_server();
-}
-
-void SocketStream::SetClientSocketFactory(
-    ClientSocketFactory* factory) {
-  DCHECK(factory);
-  factory_ = factory;
-}
-
-void SocketStream::CancelWithError(int error) {
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE, base::Bind(&SocketStream::DoLoop, this, error));
-}
-
-void SocketStream::CancelWithSSLError(const SSLInfo& ssl_info) {
-  CancelWithError(MapCertStatusToNetError(ssl_info.cert_status));
-}
-
-void SocketStream::ContinueDespiteError() {
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE, base::Bind(&SocketStream::DoLoop, this, OK));
-}
-
-SocketStream::~SocketStream() {
-  DetachContext();
-  DCHECK(!delegate_);
-  DCHECK(!pac_request_);
-}
-
-SocketStream::RequestHeaders::~RequestHeaders() { data_ = NULL; }
-
-void SocketStream::set_addresses(const AddressList& addresses) {
-  addresses_ = addresses;
-}
-
-void SocketStream::DoClose() {
-  closing_ = true;
-  // If next_state_ is:
-  // - STATE_TCP_CONNECT_COMPLETE, it's waiting other socket establishing
-  //   connection.
-  // - STATE_AUTH_REQUIRED, it's waiting for restarting.
-  // - STATE_RESOLVE_PROTOCOL_COMPLETE, it's waiting for delegate_ to finish
-  //   OnStartOpenConnection method call
-  // In these states, we'll close the SocketStream now.
-  if (next_state_ == STATE_TCP_CONNECT_COMPLETE ||
-      next_state_ == STATE_AUTH_REQUIRED ||
-      next_state_ == STATE_RESOLVE_PROTOCOL_COMPLETE) {
-    DoLoop(ERR_ABORTED);
-    return;
-  }
-  // If next_state_ is STATE_READ_WRITE, we'll run DoLoop and close
-  // the SocketStream.
-  // If it's writing now, we should defer the closing after the current
-  // writing is completed.
-  if (next_state_ == STATE_READ_WRITE && !current_write_buf_.get())
-    DoLoop(ERR_ABORTED);
-
-  // In other next_state_, we'll wait for callback of other APIs, such as
-  // ResolveProxy().
-}
-
-void SocketStream::Finish(int result) {
-  DCHECK(base::MessageLoop::current())
-      << "The current base::MessageLoop must exist";
-  DCHECK(base::MessageLoopForIO::IsCurrent())
-      << "The current base::MessageLoop must be TYPE_IO";
-  DCHECK_LE(result, OK);
-  if (result == OK)
-    result = ERR_CONNECTION_CLOSED;
-  DCHECK_EQ(next_state_, STATE_NONE);
-  DVLOG(1) << "Finish result=" << ErrorToString(result);
-
-  metrics_->OnClose();
-
-  if (result != ERR_CONNECTION_CLOSED && delegate_)
-    delegate_->OnError(this, result);
-  if (result != ERR_PROTOCOL_SWITCHED && delegate_)
-    delegate_->OnClose(this);
-  delegate_ = NULL;
-
-  Release();
-}
-
-int SocketStream::DidEstablishConnection() {
-  if (!connection_->socket() || !connection_->socket()->IsConnected()) {
-    next_state_ = STATE_CLOSE;
-    return ERR_CONNECTION_FAILED;
-  }
-  next_state_ = STATE_READ_WRITE;
-  metrics_->OnConnected();
-
-  net_log_.EndEvent(NetLog::TYPE_SOCKET_STREAM_CONNECT);
-  if (delegate_)
-    delegate_->OnConnected(this, max_pending_send_allowed_);
-
-  return OK;
-}
-
-int SocketStream::DidReceiveData(int result) {
-  DCHECK(read_buf_.get());
-  DCHECK_GT(result, 0);
-  net_log_.AddEvent(NetLog::TYPE_SOCKET_STREAM_RECEIVED);
-  int len = result;
-  metrics_->OnRead(len);
-  if (delegate_) {
-    // Notify recevied data to delegate.
-    delegate_->OnReceivedData(this, read_buf_->data(), len);
-  }
-  read_buf_ = NULL;
-  return OK;
-}
-
-void SocketStream::DidSendData(int result) {
-  DCHECK_GT(result, 0);
-  DCHECK(current_write_buf_.get());
-  net_log_.AddEvent(NetLog::TYPE_SOCKET_STREAM_SENT);
-
-  int bytes_sent = result;
-
-  metrics_->OnWrite(bytes_sent);
-
-  current_write_buf_->DidConsume(result);
-
-  if (current_write_buf_->BytesRemaining())
-    return;
-
-  size_t bytes_freed = current_write_buf_->size();
-
-  current_write_buf_ = NULL;
-
-  // We freed current_write_buf_ and this instance is now able to accept more
-  // data via SendData() (note that DidConsume() doesn't free consumed memory).
-  // We can tell that to delegate_ by calling OnSentData().
-  if (delegate_)
-    delegate_->OnSentData(this, bytes_freed);
-}
-
-void SocketStream::OnIOCompleted(int result) {
-  DoLoop(result);
-}
-
-void SocketStream::OnReadCompleted(int result) {
-  if (result == 0) {
-    // 0 indicates end-of-file, so socket was closed.
-    // Don't close the socket if it's still writing.
-    server_closed_ = true;
-  } else if (result > 0 && read_buf_.get()) {
-    result = DidReceiveData(result);
-  }
-  DoLoop(result);
-}
-
-void SocketStream::OnWriteCompleted(int result) {
-  waiting_for_write_completion_ = false;
-  if (result > 0) {
-    DidSendData(result);
-    result = OK;
-  }
-  DoLoop(result);
-}
-
-void SocketStream::DoLoop(int result) {
-  if (next_state_ == STATE_NONE)
-    return;
-
-  // If context was not set, close immediately.
-  if (!context_)
-    next_state_ = STATE_CLOSE;
-
-  do {
-    State state = next_state_;
-    next_state_ = STATE_NONE;
-    switch (state) {
-      case STATE_BEFORE_CONNECT:
-        DCHECK_EQ(OK, result);
-        result = DoBeforeConnect();
-        break;
-      case STATE_BEFORE_CONNECT_COMPLETE:
-        result = DoBeforeConnectComplete(result);
-        break;
-      case STATE_RESOLVE_PROXY:
-        DCHECK_EQ(OK, result);
-        result = DoResolveProxy();
-        break;
-      case STATE_RESOLVE_PROXY_COMPLETE:
-        result = DoResolveProxyComplete(result);
-        break;
-      case STATE_RESOLVE_HOST:
-        DCHECK_EQ(OK, result);
-        result = DoResolveHost();
-        break;
-      case STATE_RESOLVE_HOST_COMPLETE:
-        result = DoResolveHostComplete(result);
-        break;
-      case STATE_RESOLVE_PROTOCOL:
-        result = DoResolveProtocol(result);
-        break;
-      case STATE_RESOLVE_PROTOCOL_COMPLETE:
-        result = DoResolveProtocolComplete(result);
-        break;
-      case STATE_TCP_CONNECT:
-        result = DoTcpConnect(result);
-        break;
-      case STATE_TCP_CONNECT_COMPLETE:
-        result = DoTcpConnectComplete(result);
-        break;
-      case STATE_GENERATE_PROXY_AUTH_TOKEN:
-        result = DoGenerateProxyAuthToken();
-        break;
-      case STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE:
-        result = DoGenerateProxyAuthTokenComplete(result);
-        break;
-      case STATE_WRITE_TUNNEL_HEADERS:
-        DCHECK_EQ(OK, result);
-        result = DoWriteTunnelHeaders();
-        break;
-      case STATE_WRITE_TUNNEL_HEADERS_COMPLETE:
-        result = DoWriteTunnelHeadersComplete(result);
-        break;
-      case STATE_READ_TUNNEL_HEADERS:
-        DCHECK_EQ(OK, result);
-        result = DoReadTunnelHeaders();
-        break;
-      case STATE_READ_TUNNEL_HEADERS_COMPLETE:
-        result = DoReadTunnelHeadersComplete(result);
-        break;
-      case STATE_SOCKS_CONNECT:
-        DCHECK_EQ(OK, result);
-        result = DoSOCKSConnect();
-        break;
-      case STATE_SOCKS_CONNECT_COMPLETE:
-        result = DoSOCKSConnectComplete(result);
-        break;
-      case STATE_SECURE_PROXY_CONNECT:
-        DCHECK_EQ(OK, result);
-        result = DoSecureProxyConnect();
-        break;
-      case STATE_SECURE_PROXY_CONNECT_COMPLETE:
-        result = DoSecureProxyConnectComplete(result);
-        break;
-      case STATE_SECURE_PROXY_HANDLE_CERT_ERROR:
-        result = DoSecureProxyHandleCertError(result);
-        break;
-      case STATE_SECURE_PROXY_HANDLE_CERT_ERROR_COMPLETE:
-        result = DoSecureProxyHandleCertErrorComplete(result);
-        break;
-      case STATE_SSL_CONNECT:
-        DCHECK_EQ(OK, result);
-        result = DoSSLConnect();
-        break;
-      case STATE_SSL_CONNECT_COMPLETE:
-        result = DoSSLConnectComplete(result);
-        break;
-      case STATE_SSL_HANDLE_CERT_ERROR:
-        result = DoSSLHandleCertError(result);
-        break;
-      case STATE_SSL_HANDLE_CERT_ERROR_COMPLETE:
-        result = DoSSLHandleCertErrorComplete(result);
-        break;
-      case STATE_READ_WRITE:
-        result = DoReadWrite(result);
-        break;
-      case STATE_AUTH_REQUIRED:
-        // It might be called when DoClose is called while waiting in
-        // STATE_AUTH_REQUIRED.
-        Finish(result);
-        return;
-      case STATE_CLOSE:
-        DCHECK_LE(result, OK);
-        Finish(result);
-        return;
-      default:
-        NOTREACHED() << "bad state " << state;
-        Finish(result);
-        return;
-    }
-    if (state == STATE_RESOLVE_PROTOCOL && result == ERR_PROTOCOL_SWITCHED)
-      continue;
-    // If the connection is not established yet and had actual errors,
-    // record the error.  In next iteration, it will close the connection.
-    if (state != STATE_READ_WRITE && result < ERR_IO_PENDING) {
-      net_log_.EndEventWithNetErrorCode(
-          NetLog::TYPE_SOCKET_STREAM_CONNECT, result);
-    }
-  } while (result != ERR_IO_PENDING);
-}
-
-int SocketStream::DoBeforeConnect() {
-  next_state_ = STATE_BEFORE_CONNECT_COMPLETE;
-  if (!context_ || !context_->network_delegate())
-    return OK;
-
-  int result = context_->network_delegate()->NotifyBeforeSocketStreamConnect(
-      this, io_callback_);
-  if (result != OK && result != ERR_IO_PENDING)
-    next_state_ = STATE_CLOSE;
-
-  return result;
-}
-
-int SocketStream::DoBeforeConnectComplete(int result) {
-  DCHECK_NE(ERR_IO_PENDING, result);
-
-  if (result == OK)
-    next_state_ = STATE_RESOLVE_PROXY;
-  else
-    next_state_ = STATE_CLOSE;
-
-  return result;
-}
-
-int SocketStream::DoResolveProxy() {
-  DCHECK(context_);
-  DCHECK(!pac_request_);
-  next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
-
-  if (!proxy_url_.is_valid()) {
-    next_state_ = STATE_CLOSE;
-    return ERR_INVALID_ARGUMENT;
-  }
-
-  // TODO(toyoshim): Check server advertisement of SPDY through the HTTP
-  // Alternate-Protocol header, then switch to SPDY if SPDY is available.
-  // Usually we already have a session to the SPDY server because JavaScript
-  // running WebSocket itself would be served by SPDY. But, in some situation
-  // (E.g. Used by Chrome Extensions or used for cross origin connection), this
-  // connection might be the first one. At that time, we should check
-  // Alternate-Protocol header here for ws:// or TLS NPN extension for wss:// .
-
-  return context_->proxy_service()->ResolveProxy(
-      proxy_url_, net::LOAD_NORMAL, &proxy_info_, io_callback_, &pac_request_,
-      NULL, net_log_);
-}
-
-int SocketStream::DoResolveProxyComplete(int result) {
-  pac_request_ = NULL;
-  if (result != OK) {
-    DVLOG(1) << "Failed to resolve proxy: " << result;
-    if (delegate_)
-      delegate_->OnError(this, result);
-    proxy_info_.UseDirect();
-  }
-  if (proxy_info_.is_direct()) {
-    // If proxy was not found for original URL (i.e. websocket URL),
-    // try again with https URL, like Safari implementation.
-    // Note that we don't want to use http proxy, because we'll use tunnel
-    // proxy using CONNECT method, which is used by https proxy.
-    if (!proxy_url_.SchemeIs("https")) {
-      const std::string scheme = "https";
-      GURL::Replacements repl;
-      repl.SetSchemeStr(scheme);
-      proxy_url_ = url_.ReplaceComponents(repl);
-      DVLOG(1) << "Try https proxy: " << proxy_url_;
-      next_state_ = STATE_RESOLVE_PROXY;
-      return OK;
-    }
-  }
-
-  if (proxy_info_.is_empty()) {
-    // No proxies/direct to choose from. This happens when we don't support any
-    // of the proxies in the returned list.
-    return ERR_NO_SUPPORTED_PROXIES;
-  }
-
-  next_state_ = STATE_RESOLVE_HOST;
-  return OK;
-}
-
-int SocketStream::DoResolveHost() {
-  next_state_ = STATE_RESOLVE_HOST_COMPLETE;
-
-  DCHECK(!proxy_info_.is_empty());
-  if (proxy_info_.is_direct())
-    proxy_mode_ = kDirectConnection;
-  else if (proxy_info_.proxy_server().is_socks())
-    proxy_mode_ = kSOCKSProxy;
-  else
-    proxy_mode_ = kTunnelProxy;
-
-  // Determine the host and port to connect to.
-  HostPortPair host_port_pair;
-  if (proxy_mode_ != kDirectConnection) {
-    host_port_pair = proxy_info_.proxy_server().host_port_pair();
-  } else {
-    host_port_pair = HostPortPair::FromURL(url_);
-  }
-
-  HostResolver::RequestInfo resolve_info(host_port_pair);
-
-  DCHECK(context_->host_resolver());
-  resolver_.reset(new SingleRequestHostResolver(context_->host_resolver()));
-  return resolver_->Resolve(resolve_info,
-                            DEFAULT_PRIORITY,
-                            &addresses_,
-                            base::Bind(&SocketStream::OnIOCompleted, this),
-                            net_log_);
-}
-
-int SocketStream::DoResolveHostComplete(int result) {
-  if (result == OK)
-    next_state_ = STATE_RESOLVE_PROTOCOL;
-  else
-    next_state_ = STATE_CLOSE;
-  // TODO(ukai): if error occured, reconsider proxy after error.
-  return result;
-}
-
-int SocketStream::DoResolveProtocol(int result) {
-  DCHECK_EQ(OK, result);
-
-  if (!delegate_) {
-    next_state_ = STATE_CLOSE;
-    return result;
-  }
-
-  next_state_ = STATE_RESOLVE_PROTOCOL_COMPLETE;
-  result = delegate_->OnStartOpenConnection(this, io_callback_);
-  if (result == ERR_IO_PENDING)
-    metrics_->OnWaitConnection();
-  else if (result != OK && result != ERR_PROTOCOL_SWITCHED)
-    next_state_ = STATE_CLOSE;
-  return result;
-}
-
-int SocketStream::DoResolveProtocolComplete(int result) {
-  DCHECK_NE(ERR_IO_PENDING, result);
-
-  if (result == ERR_PROTOCOL_SWITCHED) {
-    next_state_ = STATE_CLOSE;
-    metrics_->OnCountWireProtocolType(
-        SocketStreamMetrics::WIRE_PROTOCOL_SPDY);
-  } else if (result == OK) {
-    next_state_ = STATE_TCP_CONNECT;
-    metrics_->OnCountWireProtocolType(
-        SocketStreamMetrics::WIRE_PROTOCOL_WEBSOCKET);
-  } else {
-    next_state_ = STATE_CLOSE;
-  }
-  return result;
-}
-
-int SocketStream::DoTcpConnect(int result) {
-  if (result != OK) {
-    next_state_ = STATE_CLOSE;
-    return result;
-  }
-  next_state_ = STATE_TCP_CONNECT_COMPLETE;
-  DCHECK(factory_);
-  connection_->SetSocket(
-      factory_->CreateTransportClientSocket(addresses_,
-                                            net_log_.net_log(),
-                                            net_log_.source()));
-  metrics_->OnStartConnection();
-  return connection_->socket()->Connect(io_callback_);
-}
-
-int SocketStream::DoTcpConnectComplete(int result) {
-  // TODO(ukai): if error occured, reconsider proxy after error.
-  if (result != OK) {
-    next_state_ = STATE_CLOSE;
-    return result;
-  }
-
-  if (proxy_mode_ == kTunnelProxy) {
-    if (proxy_info_.is_https())
-      next_state_ = STATE_SECURE_PROXY_CONNECT;
-    else
-      next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN;
-  } else if (proxy_mode_ == kSOCKSProxy) {
-    next_state_ = STATE_SOCKS_CONNECT;
-  } else if (is_secure()) {
-    next_state_ = STATE_SSL_CONNECT;
-  } else {
-    result = DidEstablishConnection();
-  }
-  return result;
-}
-
-int SocketStream::DoGenerateProxyAuthToken() {
-  next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE;
-  if (!proxy_auth_controller_.get()) {
-    DCHECK(context_);
-    DCHECK(context_->http_transaction_factory());
-    DCHECK(context_->http_transaction_factory()->GetSession());
-    HttpNetworkSession* session =
-        context_->http_transaction_factory()->GetSession();
-    const char* scheme = proxy_info_.is_https() ? "https://" : "http://";
-    GURL auth_url(scheme +
-                  proxy_info_.proxy_server().host_port_pair().ToString());
-    proxy_auth_controller_ =
-        new HttpAuthController(HttpAuth::AUTH_PROXY,
-                               auth_url,
-                               session->http_auth_cache(),
-                               session->http_auth_handler_factory());
-  }
-  HttpRequestInfo request_info;
-  request_info.url = url_;
-  request_info.method = "CONNECT";
-  return proxy_auth_controller_->MaybeGenerateAuthToken(
-      &request_info, io_callback_, net_log_);
-}
-
-int SocketStream::DoGenerateProxyAuthTokenComplete(int result) {
-  if (result != OK) {
-    next_state_ = STATE_CLOSE;
-    return result;
-  }
-
-  next_state_ = STATE_WRITE_TUNNEL_HEADERS;
-  return result;
-}
-
-int SocketStream::DoWriteTunnelHeaders() {
-  DCHECK_EQ(kTunnelProxy, proxy_mode_);
-
-  next_state_ = STATE_WRITE_TUNNEL_HEADERS_COMPLETE;
-
-  if (!tunnel_request_headers_.get()) {
-    metrics_->OnCountConnectionType(SocketStreamMetrics::TUNNEL_CONNECTION);
-    tunnel_request_headers_ = new RequestHeaders();
-    tunnel_request_headers_bytes_sent_ = 0;
-  }
-  if (tunnel_request_headers_->headers_.empty()) {
-    HttpRequestHeaders request_headers;
-    request_headers.SetHeader("Host", GetHostAndOptionalPort(url_));
-    request_headers.SetHeader("Proxy-Connection", "keep-alive");
-    if (proxy_auth_controller_.get() && proxy_auth_controller_->HaveAuth())
-      proxy_auth_controller_->AddAuthorizationHeader(&request_headers);
-    tunnel_request_headers_->headers_ = base::StringPrintf(
-        "CONNECT %s HTTP/1.1\r\n"
-        "%s",
-        GetHostAndPort(url_).c_str(),
-        request_headers.ToString().c_str());
-  }
-  tunnel_request_headers_->SetDataOffset(tunnel_request_headers_bytes_sent_);
-  int buf_len = static_cast<int>(tunnel_request_headers_->headers_.size() -
-                                 tunnel_request_headers_bytes_sent_);
-  DCHECK_GT(buf_len, 0);
-  return connection_->socket()->Write(
-      tunnel_request_headers_.get(), buf_len, io_callback_);
-}
-
-int SocketStream::DoWriteTunnelHeadersComplete(int result) {
-  DCHECK_EQ(kTunnelProxy, proxy_mode_);
-
-  if (result < 0) {
-    next_state_ = STATE_CLOSE;
-    return result;
-  }
-
-  tunnel_request_headers_bytes_sent_ += result;
-  if (tunnel_request_headers_bytes_sent_ <
-      tunnel_request_headers_->headers_.size()) {
-    next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN;
-  } else {
-    // Handling a cert error or a client cert request requires reconnection.
-    // DoWriteTunnelHeaders() will be called again.
-    // Thus |tunnel_request_headers_bytes_sent_| should be reset to 0 for
-    // sending |tunnel_request_headers_| correctly.
-    tunnel_request_headers_bytes_sent_ = 0;
-    next_state_ = STATE_READ_TUNNEL_HEADERS;
-  }
-  return OK;
-}
-
-int SocketStream::DoReadTunnelHeaders() {
-  DCHECK_EQ(kTunnelProxy, proxy_mode_);
-
-  next_state_ = STATE_READ_TUNNEL_HEADERS_COMPLETE;
-
-  if (!tunnel_response_headers_.get()) {
-    tunnel_response_headers_ = new ResponseHeaders();
-    tunnel_response_headers_capacity_ = kMaxTunnelResponseHeadersSize;
-    tunnel_response_headers_->Realloc(tunnel_response_headers_capacity_);
-    tunnel_response_headers_len_ = 0;
-  }
-
-  int buf_len = tunnel_response_headers_capacity_ -
-      tunnel_response_headers_len_;
-  tunnel_response_headers_->SetDataOffset(tunnel_response_headers_len_);
-  CHECK(tunnel_response_headers_->data());
-
-  return connection_->socket()->Read(
-      tunnel_response_headers_.get(), buf_len, io_callback_);
-}
-
-int SocketStream::DoReadTunnelHeadersComplete(int result) {
-  DCHECK_EQ(kTunnelProxy, proxy_mode_);
-
-  if (result < 0) {
-    next_state_ = STATE_CLOSE;
-    return result;
-  }
-
-  if (result == 0) {
-    // 0 indicates end-of-file, so socket was closed.
-    next_state_ = STATE_CLOSE;
-    return ERR_CONNECTION_CLOSED;
-  }
-
-  tunnel_response_headers_len_ += result;
-  DCHECK(tunnel_response_headers_len_ <= tunnel_response_headers_capacity_);
-
-  int eoh = HttpUtil::LocateEndOfHeaders(
-      tunnel_response_headers_->headers(), tunnel_response_headers_len_, 0);
-  if (eoh == -1) {
-    if (tunnel_response_headers_len_ >= kMaxTunnelResponseHeadersSize) {
-      next_state_ = STATE_CLOSE;
-      return ERR_RESPONSE_HEADERS_TOO_BIG;
-    }
-
-    next_state_ = STATE_READ_TUNNEL_HEADERS;
-    return OK;
-  }
-  // DidReadResponseHeaders
-  scoped_refptr<HttpResponseHeaders> headers;
-  headers = new HttpResponseHeaders(
-      HttpUtil::AssembleRawHeaders(tunnel_response_headers_->headers(), eoh));
-  if (headers->GetParsedHttpVersion() < HttpVersion(1, 0)) {
-    // Require the "HTTP/1.x" status line.
-    next_state_ = STATE_CLOSE;
-    return ERR_TUNNEL_CONNECTION_FAILED;
-  }
-  switch (headers->response_code()) {
-    case 200:  // OK
-      if (is_secure()) {
-        DCHECK_EQ(eoh, tunnel_response_headers_len_);
-        next_state_ = STATE_SSL_CONNECT;
-      } else {
-        result = DidEstablishConnection();
-        if (result < 0) {
-          next_state_ = STATE_CLOSE;
-          return result;
-        }
-        if ((eoh < tunnel_response_headers_len_) && delegate_)
-          delegate_->OnReceivedData(
-              this, tunnel_response_headers_->headers() + eoh,
-              tunnel_response_headers_len_ - eoh);
-      }
-      return OK;
-    case 407:  // Proxy Authentication Required.
-      if (proxy_mode_ != kTunnelProxy)
-        return ERR_UNEXPECTED_PROXY_AUTH;
-
-      result = proxy_auth_controller_->HandleAuthChallenge(
-          headers, false, true, net_log_);
-      if (result != OK)
-        return result;
-      DCHECK(!proxy_info_.is_empty());
-      next_state_ = STATE_AUTH_REQUIRED;
-      if (proxy_auth_controller_->HaveAuth()) {
-        base::MessageLoop::current()->PostTask(
-            FROM_HERE, base::Bind(&SocketStream::DoRestartWithAuth, this));
-        return ERR_IO_PENDING;
-      }
-      if (delegate_) {
-        // Wait until RestartWithAuth or Close is called.
-        base::MessageLoop::current()->PostTask(
-            FROM_HERE, base::Bind(&SocketStream::DoAuthRequired, this));
-        return ERR_IO_PENDING;
-      }
-      break;
-    default:
-      break;
-  }
-  next_state_ = STATE_CLOSE;
-  return ERR_TUNNEL_CONNECTION_FAILED;
-}
-
-int SocketStream::DoSOCKSConnect() {
-  DCHECK_EQ(kSOCKSProxy, proxy_mode_);
-
-  next_state_ = STATE_SOCKS_CONNECT_COMPLETE;
-
-  HostResolver::RequestInfo req_info(HostPortPair::FromURL(url_));
-
-  DCHECK(!proxy_info_.is_empty());
-  scoped_ptr<StreamSocket> s;
-  if (proxy_info_.proxy_server().scheme() == ProxyServer::SCHEME_SOCKS5) {
-    s.reset(new SOCKS5ClientSocket(connection_.Pass(), req_info));
-  } else {
-    s.reset(new SOCKSClientSocket(connection_.Pass(),
-                                  req_info,
-                                  DEFAULT_PRIORITY,
-                                  context_->host_resolver()));
-  }
-  connection_.reset(new ClientSocketHandle);
-  connection_->SetSocket(s.Pass());
-  metrics_->OnCountConnectionType(SocketStreamMetrics::SOCKS_CONNECTION);
-  return connection_->socket()->Connect(io_callback_);
-}
-
-int SocketStream::DoSOCKSConnectComplete(int result) {
-  DCHECK_EQ(kSOCKSProxy, proxy_mode_);
-
-  if (result == OK) {
-    if (is_secure())
-      next_state_ = STATE_SSL_CONNECT;
-    else
-      result = DidEstablishConnection();
-  } else {
-    next_state_ = STATE_CLOSE;
-  }
-  return result;
-}
-
-int SocketStream::DoSecureProxyConnect() {
-  DCHECK(factory_);
-  SSLClientSocketContext ssl_context;
-  ssl_context.cert_verifier = context_->cert_verifier();
-  ssl_context.transport_security_state = context_->transport_security_state();
-  ssl_context.channel_id_service = context_->channel_id_service();
-  scoped_ptr<StreamSocket> socket(factory_->CreateSSLClientSocket(
-      connection_.Pass(),
-      proxy_info_.proxy_server().host_port_pair(),
-      proxy_ssl_config_,
-      ssl_context));
-  connection_.reset(new ClientSocketHandle);
-  connection_->SetSocket(socket.Pass());
-  next_state_ = STATE_SECURE_PROXY_CONNECT_COMPLETE;
-  metrics_->OnCountConnectionType(SocketStreamMetrics::SECURE_PROXY_CONNECTION);
-  return connection_->socket()->Connect(io_callback_);
-}
-
-int SocketStream::DoSecureProxyConnectComplete(int result) {
-  DCHECK_EQ(STATE_NONE, next_state_);
-  // Reconnect with client authentication.
-  if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED)
-    return HandleCertificateRequest(result, &proxy_ssl_config_);
-
-  if (IsCertificateError(result))
-    next_state_ = STATE_SECURE_PROXY_HANDLE_CERT_ERROR;
-  else if (result == OK)
-    next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN;
-  else
-    next_state_ = STATE_CLOSE;
-  return result;
-}
-
-int SocketStream::DoSecureProxyHandleCertError(int result) {
-  DCHECK_EQ(STATE_NONE, next_state_);
-  DCHECK(IsCertificateError(result));
-  result = HandleCertificateError(result);
-  if (result == ERR_IO_PENDING)
-    next_state_ = STATE_SECURE_PROXY_HANDLE_CERT_ERROR_COMPLETE;
-  else
-    next_state_ = STATE_CLOSE;
-  return result;
-}
-
-int SocketStream::DoSecureProxyHandleCertErrorComplete(int result) {
-  DCHECK_EQ(STATE_NONE, next_state_);
-  if (result == OK) {
-    if (!connection_->socket()->IsConnectedAndIdle())
-      return AllowCertErrorForReconnection(&proxy_ssl_config_);
-    next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN;
-  } else {
-    next_state_ = STATE_CLOSE;
-  }
-  return result;
-}
-
-int SocketStream::DoSSLConnect() {
-  DCHECK(factory_);
-  SSLClientSocketContext ssl_context;
-  ssl_context.cert_verifier = context_->cert_verifier();
-  ssl_context.transport_security_state = context_->transport_security_state();
-  ssl_context.channel_id_service = context_->channel_id_service();
-  scoped_ptr<StreamSocket> socket(
-      factory_->CreateSSLClientSocket(connection_.Pass(),
-                                      HostPortPair::FromURL(url_),
-                                      server_ssl_config_,
-                                      ssl_context));
-  connection_.reset(new ClientSocketHandle);
-  connection_->SetSocket(socket.Pass());
-  next_state_ = STATE_SSL_CONNECT_COMPLETE;
-  metrics_->OnCountConnectionType(SocketStreamMetrics::SSL_CONNECTION);
-  return connection_->socket()->Connect(io_callback_);
-}
-
-int SocketStream::DoSSLConnectComplete(int result) {
-  DCHECK_EQ(STATE_NONE, next_state_);
-  // Reconnect with client authentication.
-  if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED)
-    return HandleCertificateRequest(result, &server_ssl_config_);
-
-  if (IsCertificateError(result))
-    next_state_ = STATE_SSL_HANDLE_CERT_ERROR;
-  else if (result == OK)
-    result = DidEstablishConnection();
-  else
-    next_state_ = STATE_CLOSE;
-  return result;
-}
-
-int SocketStream::DoSSLHandleCertError(int result) {
-  DCHECK_EQ(STATE_NONE, next_state_);
-  DCHECK(IsCertificateError(result));
-  result = HandleCertificateError(result);
-  if (result == OK || result == ERR_IO_PENDING)
-    next_state_ = STATE_SSL_HANDLE_CERT_ERROR_COMPLETE;
-  else
-    next_state_ = STATE_CLOSE;
-  return result;
-}
-
-int SocketStream::DoSSLHandleCertErrorComplete(int result) {
-  DCHECK_EQ(STATE_NONE, next_state_);
-  // TODO(toyoshim): Upgrade to SPDY through TLS NPN extension if possible.
-  // If we use HTTPS and this is the first connection to the SPDY server,
-  // we should take care of TLS NPN extension here.
-
-  if (result == OK) {
-    if (!connection_->socket()->IsConnectedAndIdle())
-      return AllowCertErrorForReconnection(&server_ssl_config_);
-    result = DidEstablishConnection();
-  } else {
-    next_state_ = STATE_CLOSE;
-  }
-  return result;
-}
-
-int SocketStream::DoReadWrite(int result) {
-  if (result < OK) {
-    next_state_ = STATE_CLOSE;
-    return result;
-  }
-  if (!connection_->socket() || !connection_->socket()->IsConnected()) {
-    next_state_ = STATE_CLOSE;
-    return ERR_CONNECTION_CLOSED;
-  }
-
-  // If client has requested close(), and there's nothing to write, then
-  // let's close the socket.
-  // We don't care about receiving data after the socket is closed.
-  if (closing_ && !current_write_buf_.get() && pending_write_bufs_.empty()) {
-    connection_->socket()->Disconnect();
-    next_state_ = STATE_CLOSE;
-    return OK;
-  }
-
-  next_state_ = STATE_READ_WRITE;
-
-  // If server already closed the socket, we don't try to read.
-  if (!server_closed_) {
-    if (!read_buf_.get()) {
-      // No read pending and server didn't close the socket.
-      read_buf_ = new IOBuffer(kReadBufferSize);
-      result = connection_->socket()->Read(
-          read_buf_.get(),
-          kReadBufferSize,
-          base::Bind(&SocketStream::OnReadCompleted, base::Unretained(this)));
-      if (result > 0) {
-        return DidReceiveData(result);
-      } else if (result == 0) {
-        // 0 indicates end-of-file, so socket was closed.
-        next_state_ = STATE_CLOSE;
-        server_closed_ = true;
-        return ERR_CONNECTION_CLOSED;
-      }
-      // If read is pending, try write as well.
-      // Otherwise, return the result and do next loop (to close the
-      // connection).
-      if (result != ERR_IO_PENDING) {
-        next_state_ = STATE_CLOSE;
-        server_closed_ = true;
-        return result;
-      }
-    }
-    // Read is pending.
-    DCHECK(read_buf_.get());
-  }
-
-  if (waiting_for_write_completion_)
-    return ERR_IO_PENDING;
-
-  if (!current_write_buf_.get()) {
-    if (pending_write_bufs_.empty()) {
-      // Nothing buffered for send.
-      return ERR_IO_PENDING;
-    }
-
-    current_write_buf_ = new DrainableIOBuffer(
-        pending_write_bufs_.front().get(), pending_write_bufs_.front()->size());
-    pending_write_bufs_.pop_front();
-  }
-
-  result = connection_->socket()->Write(
-      current_write_buf_.get(),
-      current_write_buf_->BytesRemaining(),
-      base::Bind(&SocketStream::OnWriteCompleted, base::Unretained(this)));
-
-  if (result == ERR_IO_PENDING) {
-    waiting_for_write_completion_ = true;
-  } else if (result < 0) {
-    // Shortcut. Enter STATE_CLOSE now by changing next_state_ here than by
-    // calling DoReadWrite() again with the error code.
-    next_state_ = STATE_CLOSE;
-  } else if (result > 0) {
-    // Write is not pending. Return OK and do next loop.
-    DidSendData(result);
-    result = OK;
-  }
-
-  return result;
-}
-
-GURL SocketStream::ProxyAuthOrigin() const {
-  DCHECK(!proxy_info_.is_empty());
-  return GURL("http://" +
-              proxy_info_.proxy_server().host_port_pair().ToString());
-}
-
-int SocketStream::HandleCertificateRequest(int result, SSLConfig* ssl_config) {
-  if (ssl_config->send_client_cert) {
-    // We already have performed SSL client authentication once and failed.
-    return result;
-  }
-
-  DCHECK(connection_->socket());
-  scoped_refptr<SSLCertRequestInfo> cert_request_info = new SSLCertRequestInfo;
-  SSLClientSocket* ssl_socket =
-      static_cast<SSLClientSocket*>(connection_->socket());
-  ssl_socket->GetSSLCertRequestInfo(cert_request_info.get());
-
-  HttpTransactionFactory* factory = context_->http_transaction_factory();
-  if (!factory)
-    return result;
-  scoped_refptr<HttpNetworkSession> session = factory->GetSession();
-  if (!session.get())
-    return result;
-
-  // If the user selected one of the certificates in client_certs or declined
-  // to provide one for this server before, use the past decision
-  // automatically.
-  scoped_refptr<X509Certificate> client_cert;
-  if (!session->ssl_client_auth_cache()->Lookup(
-          cert_request_info->host_and_port, &client_cert)) {
-    return result;
-  }
-
-  // Note: |client_cert| may be NULL, indicating that the caller
-  // wishes to proceed anonymously (eg: continue the handshake
-  // without sending a client cert)
-  //
-  // Check that the certificate selected is still a certificate the server
-  // is likely to accept, based on the criteria supplied in the
-  // CertificateRequest message.
-  const std::vector<std::string>& cert_authorities =
-      cert_request_info->cert_authorities;
-  if (client_cert.get() && !cert_authorities.empty() &&
-      !client_cert->IsIssuedByEncoded(cert_authorities)) {
-    return result;
-  }
-
-  ssl_config->send_client_cert = true;
-  ssl_config->client_cert = client_cert;
-  next_state_ = STATE_TCP_CONNECT;
-  return OK;
-}
-
-int SocketStream::AllowCertErrorForReconnection(SSLConfig* ssl_config) {
-  DCHECK(ssl_config);
-  // The SSL handshake didn't finish, or the server closed the SSL connection.
-  // So, we should restart establishing connection with the certificate in
-  // allowed bad certificates in |ssl_config|.
-  // See also net/http/http_network_transaction.cc HandleCertificateError() and
-  // RestartIgnoringLastError().
-  SSLClientSocket* ssl_socket =
-      static_cast<SSLClientSocket*>(connection_->socket());
-  SSLInfo ssl_info;
-  ssl_socket->GetSSLInfo(&ssl_info);
-  if (ssl_info.cert.get() == NULL ||
-      ssl_config->IsAllowedBadCert(ssl_info.cert.get(), NULL)) {
-    // If we already have the certificate in the set of allowed bad
-    // certificates, we did try it and failed again, so we should not
-    // retry again: the connection should fail at last.
-    next_state_ = STATE_CLOSE;
-    return ERR_UNEXPECTED;
-  }
-  // Add the bad certificate to the set of allowed certificates in the
-  // SSL config object.
-  SSLConfig::CertAndStatus bad_cert;
-  if (!X509Certificate::GetDEREncoded(ssl_info.cert->os_cert_handle(),
-                                      &bad_cert.der_cert)) {
-    next_state_ = STATE_CLOSE;
-    return ERR_UNEXPECTED;
-  }
-  bad_cert.cert_status = ssl_info.cert_status;
-  ssl_config->allowed_bad_certs.push_back(bad_cert);
-  // Restart connection ignoring the bad certificate.
-  connection_->socket()->Disconnect();
-  connection_->SetSocket(scoped_ptr<StreamSocket>());
-  next_state_ = STATE_TCP_CONNECT;
-  return OK;
-}
-
-void SocketStream::DoAuthRequired() {
-  if (delegate_ && proxy_auth_controller_.get())
-    delegate_->OnAuthRequired(this, proxy_auth_controller_->auth_info().get());
-  else
-    DoLoop(ERR_UNEXPECTED);
-}
-
-void SocketStream::DoRestartWithAuth() {
-  DCHECK_EQ(next_state_, STATE_AUTH_REQUIRED);
-  tunnel_request_headers_ = NULL;
-  tunnel_request_headers_bytes_sent_ = 0;
-  tunnel_response_headers_ = NULL;
-  tunnel_response_headers_capacity_ = 0;
-  tunnel_response_headers_len_ = 0;
-
-  next_state_ = STATE_TCP_CONNECT;
-  DoLoop(OK);
-}
-
-int SocketStream::HandleCertificateError(int result) {
-  DCHECK(IsCertificateError(result));
-  SSLClientSocket* ssl_socket =
-      static_cast<SSLClientSocket*>(connection_->socket());
-  DCHECK(ssl_socket);
-
-  if (!context_)
-    return result;
-
-  if (SSLClientSocket::IgnoreCertError(result, LOAD_IGNORE_ALL_CERT_ERRORS)) {
-    const HttpNetworkSession::Params* session_params =
-        context_->GetNetworkSessionParams();
-    if (session_params && session_params->ignore_certificate_errors)
-      return OK;
-  }
-
-  if (!delegate_)
-    return result;
-
-  SSLInfo ssl_info;
-  ssl_socket->GetSSLInfo(&ssl_info);
-
-  TransportSecurityState* state = context_->transport_security_state();
-  const bool fatal = state && state->ShouldSSLErrorsBeFatal(url_.host());
-
-  delegate_->OnSSLCertificateError(this, ssl_info, fatal);
-  return ERR_IO_PENDING;
-}
-
-CookieStore* SocketStream::cookie_store() const {
-  return cookie_store_.get();
-}
-
-}  // namespace net