[net] Switch TestURLRequestContext to use MockCachingHostResolver.

net/proxy/proxy_script_fetcher_impl_unittest.cc

 // 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.
 
 #include "net/proxy/proxy_script_fetcher_impl.h"
 
 #include <string>
 
 #include "base/file_path.h"
 #include "base/compiler_specific.h"
 #include "base/path_service.h"
 #include "base/utf_string_conversions.h"
 #include "net/base/mock_cert_verifier.h"
+#include "net/base/mock_host_resolver.h"
 #include "net/base/net_util.h"
 #include "net/base/load_flags.h"
 #include "net/base/ssl_config_service_defaults.h"
 #include "net/base/test_completion_callback.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/http/http_cache.h"
 #include "net/http/http_network_session.h"
 #include "net/http/http_server_properties_impl.h"
 #include "net/test/test_server.h"
 #include "net/url_request/url_request_context_storage.h"
@@ skipping 39 matching lines @@
       const OVERRIDE{
     return NULL;
   }
 };
 
 // A non-mock URL request which can access http:// and file:// urls.
 class RequestContext : public URLRequestContext {
  public:
   RequestContext() : ALLOW_THIS_IN_INITIALIZER_LIST(storage_(this)) {
     ProxyConfig no_proxy;
-    storage_.set_host_resolver(
-        CreateSystemHostResolver(HostResolver::kDefaultParallelism,
-                                 HostResolver::kDefaultRetryAttempts,
-                                 NULL));
+    storage_.set_host_resolver(new MockHostResolver);
     storage_.set_cert_verifier(new MockCertVerifier);
     storage_.set_proxy_service(ProxyService::CreateFixed(no_proxy));
     storage_.set_ssl_config_service(new SSLConfigServiceDefaults);
     storage_.set_http_server_properties(new HttpServerPropertiesImpl);
 
     HttpNetworkSession::Params params;
     params.host_resolver = host_resolver();
     params.cert_verifier = cert_verifier();
     params.proxy_service = proxy_service();
     params.ssl_config_service = ssl_config_service();
@@ skipping 388 matching lines @@
   {
     GURL url(kEncodedUrlBroken);
     string16 text;
     TestCompletionCallback callback;
     int result = pac_fetcher.Fetch(url, &text, callback.callback());
     EXPECT_EQ(ERR_FAILED, result);
   }
 }
 
 }  // namespace net