Add the capability to run multiple proxy PAC scripts in parallel....

net/base/net_log_event_type_list.h

 // Copyright (c) 2010 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.
 
 // NOTE: No header guards are used, since this file is intended to be expanded
 // directly into net_log.h. DO NOT include this file anywhere else.
 
 // --------------------------------------------------------------------------
 // General pseudo-events
 // --------------------------------------------------------------------------
@@ skipping 92 matching lines @@
 
 // Measures the time taken to execute the "myIpAddressEx()" javascript binding.
 EVENT_TYPE(PROXY_RESOLVER_V8_MY_IP_ADDRESS_EX)
 
 // Measures the time taken to execute the "dnsResolve()" javascript binding.
 EVENT_TYPE(PROXY_RESOLVER_V8_DNS_RESOLVE)
 
 // Measures the time taken to execute the "dnsResolveEx()" javascript binding.
 EVENT_TYPE(PROXY_RESOLVER_V8_DNS_RESOLVE_EX)
 
-// Measures the time that a proxy resolve request was stalled waiting for the
+// Measures the time that a proxy resolve request was stalled waiting for a
 // proxy resolver thread to free-up.
-EVENT_TYPE(WAITING_FOR_SINGLE_PROXY_RESOLVER_THREAD)
+EVENT_TYPE(WAITING_FOR_PROXY_RESOLVER_THREAD)
+
+// This event is emitted just before a PAC request is bound to a thread. It
+// contains these parameters:
+//
+//   {
+//     "thread_number": <Identifier for the PAC thread that is going to
+//                       run this request>
+//   }
+EVENT_TYPE(SUBMITTED_TO_RESOLVER_THREAD)
 
 // ------------------------------------------------------------------------
 // ClientSocket
 // ------------------------------------------------------------------------
 
 // The start/end of a TCP connect(). This corresponds with a call to
 // TCPClientSocket::Connect().
 //
 // The START event contains these parameters:
 //
@@ skipping 449 matching lines @@
 
 // ------------------------------------------------------------------------
 // Global events
 // ------------------------------------------------------------------------
 // These are events which are not grouped by source id, as they have no
 // context.
 
 // This event is emitted whenever NetworkChangeNotifier determines that the
 // underlying network has changed.
 EVENT_TYPE(NETWORK_IP_ADDRESSSES_CHANGED)