Enable RL sync by default on iOS

components/reading_list/ios/reading_list_model_unittest.mm

 // Copyright 2016 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 "components/reading_list/ios/reading_list_model.h"
+
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #import "base/test/ios/wait_util.h"
-#include "components/reading_list/reading_list_model_impl.h"
-#include "components/reading_list/reading_list_model_storage.h"
+#include "components/reading_list/ios/reading_list_model_impl.h"
+#include "components/reading_list/ios/reading_list_model_storage.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 const GURL callback_url("http://example.com");
 const std::string callback_title("test title");
 
 class TestReadingListStorageObserver {
  public:
   virtual void ReadingListDidSaveEntry() = 0;
@@ skipping 590 matching lines @@
 }
 
 // Tests that ReadingListModel calls CallbackModelBeingDeleted when destroyed.
 TEST_F(ReadingListModelTest, CallbackModelBeingDeleted) {
   AssertObserverCount(1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
   model_.reset();
   AssertObserverCount(1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0);
 }
 
 }  // namespace