Move Network Quality Estimator files to //net/nqe

This restructures the Network Quality Estimator files to
live in //net/nqe, rather than in //net/base. Additionally,
it moves the socket-related files into //net/socket.

BUG=601940

Review-Url: https://codereview.chromium.org/1898603002
Cr-Commit-Position: refs/heads/master@{#390475}
diff --git a/net/socket/tcp_client_socket_unittest.cc b/net/socket/tcp_client_socket_unittest.cc
index 856c1087..d8499b44 100644
--- a/net/socket/tcp_client_socket_unittest.cc
+++ b/net/socket/tcp_client_socket_unittest.cc
@@ -13,8 +13,8 @@
 #include "net/base/ip_address.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
-#include "net/base/socket_performance_watcher.h"
 #include "net/base/test_completion_callback.h"
+#include "net/socket/socket_performance_watcher.h"
 #include "net/socket/tcp_server_socket.h"
 #include "testing/gtest/include/gtest/gtest.h"