Extracting NetLog inner classes into their own classes.

chrome/test/chromedriver/net/test_http_server.cc

Index: chrome/test/chromedriver/net/test_http_server.cc
diff --git a/chrome/test/chromedriver/net/test_http_server.cc b/chrome/test/chromedriver/net/test_http_server.cc
index ba863f95b424442dc8fbfe1ca7f120ea3f22652e..1999d2626ffdc2ca97c6b21ac53d43c7182b9227 100644
--- a/chrome/test/chromedriver/net/test_http_server.cc
+++ b/chrome/test/chromedriver/net/test_http_server.cc
@@ -15,6 +15,7 @@
 #include "base/time/time.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
+#include "net/log/net_log_source.h"
 #include "net/server/http_server_request_info.h"
 #include "net/socket/tcp_server_socket.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -142,7 +143,7 @@ void TestHttpServer::OnClose(int connection_id) {
 void TestHttpServer::StartOnServerThread(bool* success,
                                          base::WaitableEvent* event) {
   std::unique_ptr<net::ServerSocket> server_socket(
-      new net::TCPServerSocket(NULL, net::NetLog::Source()));
+      new net::TCPServerSocket(NULL, net::NetLogSource()));
   server_socket->ListenWithAddressAndPort("127.0.0.1", 0, 1);
   server_.reset(new net::HttpServer(std::move(server_socket), this));