[Sync] Implements the loopback sync server.

components/sync/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/features.gni")
 import("//components/sync/protocol/protocol_sources.gni")
 import("//testing/test.gni")
 
 static_library("sync") {
@@ skipping 568 matching lines @@
     deps += [ "//chromeos" ]
   }
 
   if (is_mac) {
     libs = [
       "CoreFoundation.framework",
       "SystemConfiguration.framework",  # Required by get_session_name_mac.mm.
     ]
   }
 
+  if (is_win) {
+    sources += [
+      "engine_impl/loopback_server/loopback_connection_manager.cc",
+      "engine_impl/loopback_server/loopback_connection_manager.h",
+      "engine_impl/loopback_server/loopback_server.cc",
+      "engine_impl/loopback_server/loopback_server.h",
+      "engine_impl/loopback_server/loopback_server_entity.cc",
+      "engine_impl/loopback_server/loopback_server_entity.h",
+      "engine_impl/loopback_server/persistent_bookmark_entity.cc",
+      "engine_impl/loopback_server/persistent_bookmark_entity.h",
+      "engine_impl/loopback_server/persistent_permanent_entity.cc",
+      "engine_impl/loopback_server/persistent_permanent_entity.h",
+      "engine_impl/loopback_server/persistent_tombstone_entity.cc",
+      "engine_impl/loopback_server/persistent_tombstone_entity.h",
+      "engine_impl/loopback_server/persistent_unique_client_entity.cc",
+      "engine_impl/loopback_server/persistent_unique_client_entity.h",
+    ]
+  }
+
   if (enable_configuration_policy) {
     sources += [
       "driver/sync_policy_handler.cc",
       "driver/sync_policy_handler.h",
     ]
     deps += [
       "//components/policy:generated",
       "//components/policy/core/browser",
     ]
   }
@@ skipping 342 matching lines @@
 
   if (is_chromeos) {
     # Required by get_session_name_unittest.cc on Chrome OS.
     deps += [ "//chromeos" ]
   }
 
   if (is_ios) {
     sources -= [ "engine/net/http_bridge_unittest.cc" ]
   }
 
+  if (is_win) {
+    sources += [ "engine_impl/loopback_server/loopback_server_unittest.cc" ]
+  }
+
   if (enable_configuration_policy) {
     sources += [ "driver/sync_policy_handler_unittest.cc" ]
     deps += [
       "//components/policy:generated",
       "//components/policy/core/browser",
     ]
   }
 
   defines = [ "SYNC_TEST" ]
 }
@@ skipping 134 matching lines @@
     deps = [
       ":fake_server_jni",
       ":sync",
       ":test_support_fake_server",
       "//base",
       "//testing/gtest",
       "//url:url",
     ]
   }
 }