Enable RL sync by default on iOS

components/reading_list/ios/reading_list_store_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/reading_list_store.h"
+#include "components/reading_list/ios/reading_list_store.h"
 
 #include <map>
 #include <set>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #import "base/test/ios/wait_util.h"
-#include "components/reading_list/reading_list_model_impl.h"
+#include "components/reading_list/ios/reading_list_model_impl.h"
 #include "components/sync/model/fake_model_type_change_processor.h"
 #include "components/sync/model/model_type_store_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class FakeModelTypeChangeProcessorObserver {
  public:
   virtual void Put(const std::string& client_tag,
                    std::unique_ptr<syncer::EntityData> entity_data,
                    syncer::MetadataChangeList* metadata_change_list) = 0;
 
@@ skipping 252 matching lines @@
 TEST_F(ReadingListStoreTest, ApplySyncChangesOneRemove) {
   syncer::EntityChangeList delete_changes;
   delete_changes.push_back(
       syncer::EntityChange::CreateDelete("http://read.example.com/"));
   syncer::SyncError error = reading_list_store_->ApplySyncChanges(
       reading_list_store_->CreateMetadataChangeList(), delete_changes);
   AssertCounts(0, 0, 0, 1, 0);
   EXPECT_EQ(sync_removed_.size(), 1u);
   EXPECT_EQ(sync_removed_.count("http://read.example.com/"), 1u);
 }