1 files changed, 45 insertions, 0 deletions
diff --git a/chromium/components/reading_list/core/reading_list_store_delegate.h b/chromium/components/reading_list/core/reading_list_store_delegate.h
new file mode 100644
index 00000000000..ad960d2e136
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+++ b/chromium/components/reading_list/core/reading_list_store_delegate.h
@@ -0,0 +1,45 @@
+// 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_CORE_READING_LIST_STORE_DELEGATE_H_
+#define COMPONENTS_READING_LIST_CORE_READING_LIST_STORE_DELEGATE_H_
+
+#include <map>
+
+#include "base/macros.h"
+
+class ReadingListEntry;
+
+// The delegate to handle callbacks from the ReadingListStore.
+class ReadingListStoreDelegate {
+ public:
+  using ReadingListEntries = std::map<GURL, ReadingListEntry>;
+  // These three methods handle callbacks from a ReadingListStore.
+  // This method is called when the local store is loaded. |entries| contains
+  // the ReadingListEntry present on the device before sync starts.
+  virtual void StoreLoaded(std::unique_ptr<ReadingListEntries> entries) = 0;
+  // Handle sync events.
+  // Called to add a new entry to the model.
+  // |entry| must not already exist in the model.
+  virtual void SyncAddEntry(std::unique_ptr<ReadingListEntry> entry) = 0;
+
+  // Called to merge a sync entry with a local entry in the model.
+  // A local entry with the same URL must exist in the local store and have an
+  // older UpdateTime.
+  // Return a pointer to the merged entry.
+  virtual ReadingListEntry* SyncMergeEntry(
+      std::unique_ptr<ReadingListEntry> entry) = 0;
+
+  // Called to remove an entry to the model.
+  virtual void SyncRemoveEntry(const GURL& url) = 0;
+
+ protected:
+  ReadingListStoreDelegate() {}
+  virtual ~ReadingListStoreDelegate() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ReadingListStoreDelegate);
+};
+
+#endif  // COMPONENTS_READING_LIST_CORE_READING_LIST_STORE_DELEGATE_H_