Make CertVerifier a pure virtual interface.

webkit/tools/test_shell/test_shell_request_context.cc

Index: webkit/tools/test_shell/test_shell_request_context.cc
diff --git a/webkit/tools/test_shell/test_shell_request_context.cc b/webkit/tools/test_shell/test_shell_request_context.cc
index e8fea2a91b36bcf14919ea624ded57e49d170241..8a98549b8f8dfa764ad226ce8dd5726de5a9c460 100644
--- a/webkit/tools/test_shell/test_shell_request_context.cc
+++ b/webkit/tools/test_shell/test_shell_request_context.cc
@@ -8,10 +8,10 @@
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
-#include "net/base/cert_verifier.h"
 #include "net/base/cookie_monster.h"
 #include "net/base/default_origin_bound_cert_store.h"
 #include "net/base/host_resolver.h"
+#include "net/base/multi_threaded_cert_verifier.h"
 #include "net/base/origin_bound_cert_service.h"
 #include "net/base/ssl_config_service_defaults.h"
 #include "net/ftp/ftp_network_layer.h"
@@ -77,7 +77,7 @@ void TestShellRequestContext::Init(
       net::CreateSystemHostResolver(net::HostResolver::kDefaultParallelism,
                                     net::HostResolver::kDefaultRetryAttempts,
                                     NULL));
-  storage_.set_cert_verifier(new net::CertVerifier);
+  storage_.set_cert_verifier(new net::MultiThreadedCertVerifier);
   storage_.set_proxy_service(net::ProxyService::CreateUsingSystemProxyResolver(
       proxy_config_service.release(), 0, NULL));
   storage_.set_ssl_config_service(