Componentize //chrome/browser/prefs/tracked.

components/user_prefs/tracked/BUILD.gn

Index: components/user_prefs/tracked/BUILD.gn
diff --git a/components/user_prefs/tracked/BUILD.gn b/components/user_prefs/tracked/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..5fe05bf3adde32ffacedc5f8914f382c96928c76
--- /dev/null
+++ b/components/user_prefs/tracked/BUILD.gn
@@ -0,0 +1,75 @@
+# 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.
+
+static_library("user_prefs_tracked") {
+  sources = [
+    "device_id.h",
+    "device_id_stub.cc",
+    "device_id_win.cc",
+    "dictionary_hash_store_contents.cc",
+    "dictionary_hash_store_contents.h",
+    "hash_store_contents.h",
+    "interceptable_pref_filter.cc",
+    "interceptable_pref_filter.h",
+    "pref_hash_calculator.cc",
+    "pref_hash_calculator.h",
+    "pref_hash_filter.cc",
+    "pref_hash_filter.h",
+    "pref_hash_store.h",
+    "pref_hash_store_impl.cc",
+    "pref_hash_store_impl.h",
+    "pref_hash_store_transaction.h",
+    "pref_names.cc",
+    "pref_names.h",
+    "pref_service_hash_store_contents.cc",
+    "pref_service_hash_store_contents.h",
+    "segregated_pref_store.cc",
+    "segregated_pref_store.h",
+    "tracked_atomic_preference.cc",
+    "tracked_atomic_preference.h",
+    "tracked_preference.h",
+    "tracked_preference_helper.cc",
+    "tracked_preference_helper.h",
+    "tracked_preference_validation_delegate.h",
+    "tracked_preferences_migration.cc",
+    "tracked_preferences_migration.h",
+    "tracked_split_preference.cc",
+    "tracked_split_preference.h",
+  ]
+
+  if (is_win) {
+    sources -= [ "device_id_stub.cc" ]
+  }
+
+  deps = [
+    "//components/pref_registry",

[Lei Zhang, 2015/08/04 18:24:45]

You probably need to depend on //base here?

[Jitu( very slow this week), 2015/08/05 10:36:39]

Yes, added.

When i build in my local machine i didn't got any error so it was missed.
But it shows in TryBots.

Thanks...

+  ]
+}
+
+source_set("user_prefs_tracked_test_support") {
+  testonly = true
+  sources = [
+    "mock_validation_delegate.cc",
+    "mock_validation_delegate.h",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "device_id_unittest.cc",
+    "pref_hash_calculator_unittest.cc",
+    "pref_hash_filter_unittest.cc",
+    "pref_hash_store_impl_unittest.cc",
+    "pref_service_hash_store_contents_unittest.cc",
+    "segregated_pref_store_unittest.cc",
+    "tracked_preferences_migration_unittest.cc",
+  ]
+
+  deps = [
+    ":user_prefs_tracked",
+    ":user_prefs_tracked_test_support",
+    "//testing/gtest",
+  ]
+}