Add PrivacyMode support to the QuicStreamFactory.

net/quic/quic_session_key_test.cc

Index: net/quic/quic_session_key_test.cc
diff --git a/net/quic/quic_session_key_test.cc b/net/quic/quic_session_key_test.cc
index b07b3b7bcffc309dea61fb580c8edc4da0f22805..e8fd4fd57ae348d310b758bbfaae3ffbbedf5219 100644
--- a/net/quic/quic_session_key_test.cc
+++ b/net/quic/quic_session_key_test.cc
@@ -15,13 +15,25 @@ namespace {
 TEST(QuicSessionKeyTest, ToString) {
   HostPortPair google_host_port_pair("google.com", 10);
 
-  QuicSessionKey google_http_key(google_host_port_pair, false);
+  QuicSessionKey google_http_key(google_host_port_pair, false,
+                                 kPrivacyModeDisabled);
   string google_http_key_str = google_http_key.ToString();
   EXPECT_EQ("http://google.com:10", google_http_key_str);
 
-  QuicSessionKey google_https_key(google_host_port_pair, true);
+  QuicSessionKey google_https_key(google_host_port_pair, true,
+                                 kPrivacyModeDisabled);
   string google_https_key_str = google_https_key.ToString();
   EXPECT_EQ("https://google.com:10", google_https_key_str);
+
+  QuicSessionKey private_http_key(google_host_port_pair, false,
+                                  kPrivacyModeEnabled);
+  string private_http_key_str = private_http_key.ToString();
+  EXPECT_EQ("http://google.com:10/private", private_http_key_str);
+
+  QuicSessionKey private_https_key(google_host_port_pair, true,
+                                   kPrivacyModeEnabled);
+  string private_https_key_str = private_https_key.ToString();
+  EXPECT_EQ("https://google.com:10/private", private_https_key_str);
 }
 
 }  // namespace