Add function to get network stack state from a URLRequestContext.

net/base/net_info_source_list.h

Index: net/base/net_info_source_list.h
diff --git a/net/base/net_info_source_list.h b/net/base/net_info_source_list.h
new file mode 100644
index 0000000000000000000000000000000000000000..be3019e9183c0676cc46cbb4f0226652193130f7
--- /dev/null
+++ b/net/base/net_info_source_list.h
@@ -0,0 +1,22 @@
+// Copyright 2014 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.
+
+// This file intentionally does not have header guards, it's included
+// inside a macro to generate enum values.
+
+// Flags used to request different types of information about the current state
+// of a URLRequestContext.
+//
+// The strings don't match the enums for historical reasons.
+
+NET_INFO_SOURCE(PROXY_SETTINGS, "proxySettings",                         1 << 0)
+NET_INFO_SOURCE(BAD_PROXIES, "badProxies",                               1 << 1)
+NET_INFO_SOURCE(HOST_RESOLVER, "hostResolverInfo",                       1 << 2)
+NET_INFO_SOURCE(SOCKET_POOL, "socketPoolInfo",                           1 << 3)
+NET_INFO_SOURCE(QUIC, "quicInfo",                                        1 << 4)
+NET_INFO_SOURCE(SPDY_SESSIONS, "spdySessionInfo",                        1 << 5)
+NET_INFO_SOURCE(SPDY_STATUS, "spdyStatus",                               1 << 6)
+NET_INFO_SOURCE(SPDY_ALT_PROTO_MAPPINGS, "spdyAlternateProtocolMappings",
+                                                                         1 << 7)
+NET_INFO_SOURCE(HTTP_CACHE, "httpCacheInfo",                             1 << 8)