Componentize //chrome/browser/prefs/tracked.

components/BUILD.gn

Index: components/BUILD.gn
diff --git a/components/BUILD.gn b/components/BUILD.gn
index 41397bf02c5dd7d9048ed47c02aaaa4e523e5665..903bc30d1e6acbb29d5944df8d5498b3ca89ac81 100644
--- a/components/BUILD.gn
+++ b/components/BUILD.gn
@@ -83,8 +83,8 @@ group("all_components") {
     "//components/power",
     "//components/precache/core",
     "//components/precache/content",
-    "//components/proxy_config",
     "//components/pref_registry",
+    "//components/proxy_config",
     "//components/query_parser",
     "//components/rappor",
     "//components/renderer_context_menu",
@@ -114,6 +114,7 @@ group("all_components") {
     "//components/url_matcher",
     "//components/user_manager",
     "//components/user_prefs",
+    "//components/user_prefs/tracked:user_prefs_tracked",
     "//components/variations",
     "//components/version_info",
     "//components/visitedlink/browser",
@@ -320,10 +321,11 @@ test("components_unittests") {
     "//components/offline_pages:unit_tests",
     "//components/omnibox/browser:unit_tests",
     "//components/packed_ct_ev_whitelist:unit_tests",
-    "//components/undo:unit_tests",
     "//components/secure_display:unit_tests",
+    "//components/undo:unit_tests",
     "//components/update_client:unit_tests",
     "//components/upload_list:unit_tests",
+    "//components/user_prefs/tracked:unit_tests",
     "//components/variations:unit_tests",
     "//components/webcrypto:unit_tests",
     "//components/web_resource:unit_tests",