Componentize PrefSyncableService and support classes.

chrome/browser/apps/drive/drive_app_mapping_unittest.cc

 // 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.
 
 #include "chrome/browser/apps/drive/drive_app_mapping.h"
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
-#include "chrome/test/base/testing_pref_service_syncable.h"
+#include "components/syncable_prefs/testing_pref_service_syncable.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class DriveAppMappingTest : public testing::Test {
  public:
   DriveAppMappingTest() {}
   ~DriveAppMappingTest() override {}
 
   // testing::Test:
   void SetUp() override {
     pref_service_.reset(new TestingPrefServiceSyncable);
@@ skipping 97 matching lines @@
 
 TEST_F(DriveAppMappingTest, TrackUninstall) {
   const std::string drive_app_id = "drive-1";
 
   mapping()->AddUninstalledDriveApp(drive_app_id);
   EXPECT_TRUE(mapping()->IsUninstalledDriveApp(drive_app_id));
 
   mapping()->RemoveUninstalledDriveApp(drive_app_id);
   EXPECT_FALSE(mapping()->IsUninstalledDriveApp(drive_app_id));
 }