Enable RL sync by default on iOS

components/reading_list/ios/reading_list_model_observer.h

 // 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.
 
-#ifndef COMPONENTS_READING_LIST_READING_LIST_MODEL_OBSERVER_H_
-#define COMPONENTS_READING_LIST_READING_LIST_MODEL_OBSERVER_H_
+#ifndef COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_
+#define COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_
 
-#import <set>
-#import <vector>
+#include <set>
+#include <vector>
 
 class ReadingListModel;
 class ReadingListEntry;
 
 // Observer for the Reading List model. In the observer methods care should be
 // taken to not modify the model.
 class ReadingListModelObserver {
  public:
   // Invoked when the model has finished loading. Until this method is called it
   // is unsafe to use the model.
@@ skipping 49 matching lines @@
   // are applied and then this method is called.
   virtual void ReadingListDidApplyChanges(ReadingListModel* model) {}
 
  protected:
   ReadingListModelObserver() {}
   virtual ~ReadingListModelObserver() {}
 
   DISALLOW_COPY_AND_ASSIGN(ReadingListModelObserver);
 };
 
-#endif  // COMPONENTS_READING_LIST_READING_LIST_MODEL_OBSERVER_H_
+#endif  // COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_