WIP: Pref service user prefs.

services/preferences/BUILD.gn

Index: services/preferences/BUILD.gn
diff --git a/services/preferences/BUILD.gn b/services/preferences/BUILD.gn
index 58a2d4ae1ced20fdc57c76f449e189d30b3a8f1e..d2fa8b636b946acdccc301d826913dc55355c6c3 100644
--- a/services/preferences/BUILD.gn
+++ b/services/preferences/BUILD.gn
@@ -15,3 +15,33 @@ service_manifest("manifest") {
   name = "preferences2"
   source = "manifest.json"
 }
+
+source_set("preferences") {
+  public_deps = [
+    "//services/preferences/public/interfaces",
+  ]
+  deps = [
+    "//components/prefs",
+    "//components/user_prefs/tracked:user_prefs_tracked",
+  ]
+  sources = [
+    "user_prefs.cc",
+    "user_prefs.h",
+    "user_prefs_factory.cc",
+    "user_prefs_factory.h",
+  ]
+}
+
+source_set("test_support") {
+  testonly = true
+  deps = [
+    ":preferences",
+    "//services/preferences/public/cpp",
+    "//services/preferences/public/interfaces",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+  sources = [
+    "user_prefs_unittest.cc",
+  ]
+}