Extracting NetLog inner classes into their own classes.

net/socket/socket_test_util.h

Index: net/socket/socket_test_util.h
diff --git a/net/socket/socket_test_util.h b/net/socket/socket_test_util.h
index 066a1ac87384a0fdcd56453f82f1d46ab45bc549..4cc20d6296f392c2c2ea771c000c658c7c83ede3 100644
--- a/net/socket/socket_test_util.h
+++ b/net/socket/socket_test_util.h
@@ -29,7 +29,7 @@
 #include "net/base/test_completion_callback.h"
 #include "net/http/http_auth_controller.h"
 #include "net/http/http_proxy_client_socket_pool.h"
-#include "net/log/net_log.h"
+#include "net/log/net_log_with_source.h"
 #include "net/socket/client_socket_factory.h"
 #include "net/socket/client_socket_handle.h"
 #include "net/socket/connection_attempts.h"
@@ -48,6 +48,8 @@ class RunLoop;
 
 namespace net {
 
+class NetLog;
+
 const NetworkChangeNotifier::NetworkHandle kDefaultNetworkForTests = 1;
 const NetworkChangeNotifier::NetworkHandle kNewNetworkForTests = 2;
 
@@ -517,12 +519,12 @@ class MockClientSocketFactory : public ClientSocketFactory {
       DatagramSocket::BindType bind_type,
       const RandIntCallback& rand_int_cb,
       NetLog* net_log,
-      const NetLog::Source& source) override;
+      const NetLogSource& source) override;
   std::unique_ptr<StreamSocket> CreateTransportClientSocket(
       const AddressList& addresses,
       std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher,
       NetLog* net_log,
-      const NetLog::Source& source) override;
+      const NetLogSource& source) override;
   std::unique_ptr<SSLClientSocket> CreateSSLClientSocket(
       std::unique_ptr<ClientSocketHandle> transport_socket,
       const HostPortPair& host_and_port,