Make CertVerifier a pure virtual interface.

content/shell/shell_url_request_context_getter.cc

Index: content/shell/shell_url_request_context_getter.cc
diff --git a/content/shell/shell_url_request_context_getter.cc b/content/shell/shell_url_request_context_getter.cc
index b21c9b3432670c3031008e50aea5eb286cd0fbd3..df49eae3bd9c8c412f107e6a19d017b913b27da6 100644
--- a/content/shell/shell_url_request_context_getter.cc
+++ b/content/shell/shell_url_request_context_getter.cc
@@ -7,10 +7,10 @@
 #include "base/logging.h"
 #include "base/string_split.h"
 #include "content/public/browser/browser_thread.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/http/http_auth_handler_factory.h"
@@ -61,7 +61,7 @@ net::URLRequestContext* ShellURLRequestContextGetter::GetURLRequestContext() {
         net::CreateSystemHostResolver(net::HostResolver::kDefaultParallelism,
                                       net::HostResolver::kDefaultRetryAttempts,
                                       NULL));
-    storage_->set_cert_verifier(new net::CertVerifier);
+    storage_->set_cert_verifier(new net::MultiThreadedCertVerifier);
     // TODO(jam): use v8 if possible, look at chrome code.
     storage_->set_proxy_service(
         net::ProxyService::CreateUsingSystemProxyResolver(