Replace NTLMv1 implementation with a functionally equivalent one.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 0b203069d6a1dd15be8266d5365088cbef0b7bdf..4d9c299137672e25b86ccb1715219a0f97fc4f3d 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -1028,6 +1028,8 @@ component("net") {
       "ntlm/ntlm_buffer_reader.h",
       "ntlm/ntlm_buffer_writer.cc",
       "ntlm/ntlm_buffer_writer.h",
+      "ntlm/ntlm_client.cc",
+      "ntlm/ntlm_client.h",
       "ntlm/ntlm_constants.h",
       "proxy/dhcp_proxy_script_adapter_fetcher_win.cc",
       "proxy/dhcp_proxy_script_adapter_fetcher_win.h",
@@ -1782,6 +1784,8 @@ component("net") {
         "ntlm/ntlm_buffer_reader.h",
         "ntlm/ntlm_buffer_writer.cc",
         "ntlm/ntlm_buffer_writer.h",
+        "ntlm/ntlm_client.cc",
+        "ntlm/ntlm_client.h",
         "ntlm/ntlm_constants.h",
       ]
     }
@@ -4828,6 +4832,7 @@ test("net_unittests") {
     "ntlm/des_unittest.cc",
     "ntlm/ntlm_buffer_reader_unittest.cc",
     "ntlm/ntlm_buffer_writer_unittest.cc",
+    "ntlm/ntlm_client_unittest.cc",
     "ntlm/ntlm_test_data.h",
     "ntlm/ntlm_unittest.cc",
     "proxy/dhcp_proxy_script_adapter_fetcher_win_unittest.cc",
@@ -5249,6 +5254,7 @@ test("net_unittests") {
       "ntlm/des_unittest.cc",
       "ntlm/ntlm_buffer_reader_unittest.cc",
       "ntlm/ntlm_buffer_writer_unittest.cc",
+      "ntlm/ntlm_client_unittest.cc",
       "ntlm/ntlm_test_data.h",
       "ntlm/ntlm_unittest.cc",
     ]