Componentize PrefSyncableService and support classes.

components/syncable_prefs.gypi

Index: components/syncable_prefs.gypi
diff --git a/components/syncable_prefs.gypi b/components/syncable_prefs.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..7e143a14e0d8d10d25c52152a36fca93cb9f8556
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+++ b/components/syncable_prefs.gypi
@@ -0,0 +1,61 @@
+# Copyright 2015 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.
+
+{
+  'targets': [
+    {
+      # GN version: //components/syncable_prefs
+      'target_name': 'syncable_prefs',
+      'type': 'static_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../base/base.gyp:base_prefs',
+        '../sync/sync.gyp:sync',
+        'pref_registry',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'syncable_prefs/pref_model_associator.cc',
+        'syncable_prefs/pref_model_associator.h',
+        'syncable_prefs/pref_model_associator_client.h',
+        'syncable_prefs/pref_service_syncable.cc',
+        'syncable_prefs/pref_service_syncable.h',
+        'syncable_prefs/pref_service_syncable_factory.cc',
+        'syncable_prefs/pref_service_syncable_factory.h',
+        'syncable_prefs/pref_service_syncable_observer.h',
+        'syncable_prefs/synced_pref_change_registrar.cc',
+        'syncable_prefs/synced_pref_change_registrar.h',
+        'syncable_prefs/synced_pref_observer.h',
+      ],
+      'conditions': [
+        ['configuration_policy==1', {
+          'dependencies': [
+            'policy_component_browser',
+            'policy_component_common',
+          ],
+        }],
+      ],
+    },
+    {
+      # GN version: //components/syncable_prefs:test_support
+      'target_name': 'syncable_prefs_test_support',
+      'type': 'static_library',
+      'dependencies': [
+        '../testing/gtest.gyp:gtest',
+        'syncable_prefs',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'syncable_prefs/pref_service_mock_factory.cc',
+        'syncable_prefs/pref_service_mock_factory.h',
+        'syncable_prefs/testing_pref_service_syncable.cc',
+        'syncable_prefs/testing_pref_service_syncable.h',
+      ],
+    },
+  ],
+}