Add a ProxyScriptFetcher class for doing asynch downloads of PAC scripts....

net/http/http_network_transaction.cc

 // 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.
 
 #include "net/http/http_network_transaction.h"
 
 #include "base/scoped_ptr.h"
 #include "base/compiler_specific.h"
 #include "base/string_util.h"
 #include "base/trace_event.h"
@@ skipping 372 matching lines @@
   } while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
 
   return rv;
 }
 
 int HttpNetworkTransaction::DoResolveProxy() {
   DCHECK(!pac_request_);
 
   next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
 
+  if (request_->load_flags & LOAD_BYPASS_PROXY) {
+    proxy_info_.UseDirect();
+    return OK;
+  }
+
   return session_->proxy_service()->ResolveProxy(
       request_->url, &proxy_info_, &io_callback_, &pac_request_);
 }
 
 int HttpNetworkTransaction::DoResolveProxyComplete(int result) {
   next_state_ = STATE_INIT_CONNECTION;
 
   pac_request_ = NULL;
 
   if (result != OK) {
@@ skipping 618 matching lines @@
     case ERR_CONNECTION_RESET:
     case ERR_CONNECTION_REFUSED:
     case ERR_CONNECTION_ABORTED:
     case ERR_TIMED_OUT:
     case ERR_TUNNEL_CONNECTION_FAILED:
       break;
     default:
       return error;
   }
 
+  if (request_->load_flags & LOAD_BYPASS_PROXY) {
+    return error;
+  }
+
   int rv = session_->proxy_service()->ReconsiderProxyAfterError(
       request_->url, &proxy_info_, &io_callback_, &pac_request_);
   if (rv == OK || rv == ERR_IO_PENDING) {
     connection_.set_socket(NULL);
     connection_.Reset();
     DCHECK(!request_headers_bytes_sent_);
     next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
   } else {
     rv = error;
   }
@@ skipping 208 matching lines @@
   if (target == HttpAuth::AUTH_PROXY) {
     auth_info->host = ASCIIToWide(proxy_info_.proxy_server());
   } else {
     DCHECK(target == HttpAuth::AUTH_SERVER);
     auth_info->host = ASCIIToWide(request_->url.host());
   }
   response_.auth_challenge = auth_info;
 }
 
 }  // namespace net