Make all the things use cert_test_util.h.

remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc

Index: remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
diff --git a/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc b/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
index 5af52998b9b0ae82f3ea5299ba2ed6affcbaab60..49e4c1e34bc74a33657869f441a39718919ec6cf 100644
--- a/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
+++ b/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
@@ -10,6 +10,7 @@
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "crypto/rsa_private_key.h"
+#include "net/base/cert_test_util.h"
 #include "net/base/net_errors.h"
 #include "remoting/protocol/connection_tester.h"
 #include "remoting/protocol/fake_session.h"
@@ -45,12 +46,7 @@ class SslHmacChannelAuthenticatorTest : public testing::Test {
 
  protected:
   virtual void SetUp() OVERRIDE {
-    FilePath certs_dir;
-    PathService::Get(base::DIR_SOURCE_ROOT, &certs_dir);
-    certs_dir = certs_dir.AppendASCII("net");
-    certs_dir = certs_dir.AppendASCII("data");
-    certs_dir = certs_dir.AppendASCII("ssl");
-    certs_dir = certs_dir.AppendASCII("certificates");
+    FilePath certs_dir(net::GetTestCertsDirectory());
 
     FilePath cert_path = certs_dir.AppendASCII("unittest.selfsigned.der");
     ASSERT_TRUE(file_util::ReadFileToString(cert_path, &host_cert_));