Add new text for indicating we are resolving hosts during proxy resolution.

net/proxy/proxy_resolver.h

 // Copyright (c) 2011 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.
 
 #ifndef NET_PROXY_PROXY_RESOLVER_H_
 #define NET_PROXY_PROXY_RESOLVER_H_
 #pragma once
 
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/completion_callback.h"
+#include "net/base/load_states.h"
 #include "net/base/net_export.h"
 #include "net/proxy/proxy_resolver_script_data.h"
 
 namespace net {
 
 class BoundNetLog;
 class ProxyInfo;
 
 // Interface for "proxy resolvers". A ProxyResolver fills in a list of proxies
 // to use for a particular URL. Generally the backend for a ProxyResolver is
@@ skipping 18 matching lines @@
   // |*request| is written to, and can be passed to CancelRequest().
   virtual int GetProxyForURL(const GURL& url,
                              ProxyInfo* results,
                              OldCompletionCallback* callback,
                              RequestHandle* request,
                              const BoundNetLog& net_log) = 0;
 
   // Cancels |request|.
   virtual void CancelRequest(RequestHandle request) = 0;
 
+  // Gets the LoadState for |request|.
+  virtual LoadState GetLoadState(RequestHandle request) const = 0;
+
+  // Gets the LoadState for |request|. May be called from another thread.
+  virtual LoadState GetLoadStateThreadSafe(RequestHandle request) const = 0;
+
   // The PAC script backend can be specified to the ProxyResolver either via
   // URL, or via the javascript text itself.  If |expects_pac_bytes| is true,
   // then the ProxyResolverScriptData passed to SetPacScript() should
   // contain the actual script bytes rather than just the URL.
   bool expects_pac_bytes() const { return expects_pac_bytes_; }
 
   virtual void CancelSetPacScript() = 0;
 
   // Frees any unneeded memory held by the resolver, e.g. garbage in the JS
   // engine.  Most subclasses don't need to do anything, so we provide a default
@@ skipping 13 matching lines @@
 
  private:
   const bool expects_pac_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyResolver);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_RESOLVER_H_