Add a MockAsyncProxyResolverFactory and update some tests to use it.

net/http/http_network_transaction_unittest.cc

 // Copyright 2013 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 <math.h>  // ceil
 #include <stdarg.h>
 #include <string>
 #include <vector>
@@ skipping 9575 matching lines @@
   }
 
   const std::vector<GURL>& resolved() const { return resolved_; }
 
  private:
   std::vector<GURL> resolved_;
 
   DISALLOW_COPY_AND_ASSIGN(CapturingProxyResolver);
 };
 
+class CapturingProxyResolverFactory : public ProxyResolverFactory {
+ public:
+  explicit CapturingProxyResolverFactory(CapturingProxyResolver* resolver)
+      : ProxyResolverFactory(false), resolver_(resolver) {}
+
+  int CreateProxyResolver(
+      const scoped_refptr<ProxyResolverScriptData>& pac_script,
+      scoped_ptr<ProxyResolver>* resolver,
+      const net::CompletionCallback& callback,
+      scoped_ptr<Request>* request) override {
+    resolver->reset(new ForwardingProxyResolver(resolver_));
+    return OK;
+  }
+
+ private:
+  ProxyResolver* resolver_;
+};
+
 TEST_P(HttpNetworkTransactionTest,
        UseAlternateProtocolForTunneledNpnSpdy) {
   session_deps_.use_alternate_protocols = true;
   session_deps_.next_protos = SpdyNextProtos();
 
   ProxyConfig proxy_config;
   proxy_config.set_auto_detect(true);
   proxy_config.set_pac_url(GURL("http://fooproxyurl"));
 
   CapturingProxyResolver capturing_proxy_resolver;
   session_deps_.proxy_service.reset(new ProxyService(
       new ProxyConfigServiceFixed(proxy_config),
       make_scoped_ptr(
-          new ForwardingProxyResolverFactory(&capturing_proxy_resolver)),
+          new CapturingProxyResolverFactory(&capturing_proxy_resolver)),
       NULL));
   TestNetLog net_log;
   session_deps_.net_log = &net_log;
 
   HttpRequestInfo request;
   request.method = "GET";
   request.url = GURL("http://www.example.org/");
   request.load_flags = 0;
 
   std::string alternate_protocol_http_header =
@@ skipping 4260 matching lines @@
   ASSERT_TRUE(response);
   ASSERT_TRUE(response->headers.get());
 
   EXPECT_EQ(101, response->headers->response_code());
 
   trans.reset();
   session->CloseAllConnections();
 }
 
 }  // namespace net