Track sources of proxy settings.

net/proxy/proxy_list.h

Index: net/proxy/proxy_list.h
diff --git a/net/proxy/proxy_list.h b/net/proxy/proxy_list.h
index a377553c106c4346bb4351d0742c5d74f3952d2c..f090833c0f3fc99110d6bcb721e730ab9b0dc457 100644
--- a/net/proxy/proxy_list.h
+++ b/net/proxy/proxy_list.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -40,9 +40,15 @@ class NET_EXPORT_PRIVATE ProxyList {
   // |scheme_bit_field| is a bunch of ProxyServer::Scheme bitwise ORed together.
   void RemoveProxiesWithoutScheme(int scheme_bit_field);
 
+  // Clear the proxy list.
+  void Clear();
+
   // Returns true if there is nothing left in the ProxyList.
   bool IsEmpty() const;
 
+  // Returns the number of proxy servers in this list.
+  size_t size() const;
+
   // Returns the first proxy server in the list. It is only valid to call
   // this if !IsEmpty().
   const ProxyServer& Get() const;