Flush Channel IDs when Cookies get saved to a persistent backend

net/socket/ssl_client_socket_unittest.cc

Index: net/socket/ssl_client_socket_unittest.cc
diff --git a/net/socket/ssl_client_socket_unittest.cc b/net/socket/ssl_client_socket_unittest.cc
index 71399fdf19214d976353d04859adb7e825db9a9a..248ba6b7cde9305c35e958229b75268e10b82c0c 100644
--- a/net/socket/ssl_client_socket_unittest.cc
+++ b/net/socket/ssl_client_socket_unittest.cc
@@ -774,6 +774,7 @@ class FailingChannelIDStore : public ChannelIDStore {
   void GetAllChannelIDs(const GetChannelIDListCallback& callback) override {}
   int GetChannelIDCount() override { return 0; }
   void SetForceKeepSessionState() override {}
+  void Flush() override {}
   bool IsEphemeral() override { return true; }
 };
 
@@ -800,6 +801,7 @@ class AsyncFailingChannelIDStore : public ChannelIDStore {
   void GetAllChannelIDs(const GetChannelIDListCallback& callback) override {}
   int GetChannelIDCount() override { return 0; }
   void SetForceKeepSessionState() override {}
+  void Flush() override {}
   bool IsEphemeral() override { return true; }
 };