Extracting NetLog inner classes into their own classes.

device/bluetooth/bluetooth_socket_win.cc

Index: device/bluetooth/bluetooth_socket_win.cc
diff --git a/device/bluetooth/bluetooth_socket_win.cc b/device/bluetooth/bluetooth_socket_win.cc
index f6a5eeb6ac6308aa6bf7c5103dc34c7ce43197e0..0db3156a1e7612faa57812f3775179ec49f69fd0 100644
--- a/device/bluetooth/bluetooth_socket_win.cc
+++ b/device/bluetooth/bluetooth_socket_win.cc
@@ -26,6 +26,7 @@
 #include "net/base/net_errors.h"
 #include "net/base/winsock_init.h"
 #include "net/base/winsock_util.h"
+#include "net/log/net_log_source.h"
 
 namespace {
 
@@ -194,7 +195,7 @@ void BluetoothSocketWin::DoConnect(
   }
 
   std::unique_ptr<net::TCPSocket> scoped_socket(
-      new net::TCPSocket(NULL, NULL, net::NetLog::Source()));
+      new net::TCPSocket(NULL, NULL, net::NetLogSource()));
   net::EnsureWinsockInit();
   SOCKET socket_fd = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);
   SOCKADDR_BTH sa;
@@ -261,7 +262,7 @@ void BluetoothSocketWin::DoListen(
   // TCPSocket methods that involve address could not be called. So bind()
   // is called on |socket_fd| directly.
   std::unique_ptr<net::TCPSocket> scoped_socket(
-      new net::TCPSocket(NULL, NULL, net::NetLog::Source()));
+      new net::TCPSocket(NULL, NULL, net::NetLogSource()));
   scoped_socket->AdoptListenSocket(socket_fd);
 
   SOCKADDR_BTH sa;