Apps/Extensions Sync refactoring -- delete most of the old glue, implement new sync API.

chrome/browser/extensions/extension_sync_data.h

 // Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SYNC_DATA_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SYNC_DATA_H_
 #pragma once
 
 #include <string>
 
 #include "base/version.h"
+#include "chrome/browser/sync/api/sync_change.h"
+#include "chrome/browser/sync/api/sync_data.h"
+#include "chrome/common/extensions/extension.h"
 #include "googleurl/src/gurl.h"
 
-// A struct that encapsulates the synced properties of an Extension.
-struct ExtensionSyncData {
+class ExtensionService;
+class SyncData;
+namespace sync_pb { class ExtensionSpecifics; }
+
+// A class that encapsulates the synced properties of an Extension.
+class ExtensionSyncData {
+ public:
   ExtensionSyncData();
+  explicit ExtensionSyncData(const SyncData& sync_data);
+  explicit ExtensionSyncData(const SyncChange& sync_change);
+  ExtensionSyncData(const Extension& extension,
+                    bool enabled,
+                    bool incognito_enabled);
   ~ExtensionSyncData();
 
-  // Merge |new_data| into this object.  All version-independent
-  // properties are copied from |new_data|, and version-dependent
-  // properties are copied only if |new_data|'s version is equal to or
-  // greater than the current version.
-  void Merge(const ExtensionSyncData& new_data);
+  // Convert an ExtensionSyncData back out to a sync structure.
+  void PopulateSyncSpecifics(sync_pb::ExtensionSpecifics* specifics) const;
+  SyncData GetSyncData() const;
+  SyncChange GetSyncChange(SyncChange::SyncChangeType change_type) const;
 
-  std::string id;
+  const std::string& id() const { return id_; }
 
   // Version-independent properties (i.e., used even when the
   // version of the currently-installed extension doesn't match
   // |version|).
-  bool uninstalled;
-  bool enabled;
-  bool incognito_enabled;
+  bool uninstalled() const { return uninstalled_; }
+  bool enabled() const { return enabled_; }
+  bool incognito_enabled() const { return incognito_enabled_; }
+  Extension::SyncType type() const { return type_; }
 
   // Version-dependent properties (i.e., should be used only when the
   // version of the currenty-installed extension matches |version|).
-  Version version;
-  GURL update_url;
+  const Version& version() const { return version_; }
+  const GURL& update_url() const { return update_url_; }
   // Used only for debugging.
-  std::string name;
+  const std::string& name() const { return name_; }
+
+ private:
+  void PopulateFromExtensionSpecifics(
+      const sync_pb::ExtensionSpecifics& specifics);
+  void PopulateFromSyncData(const SyncData& sync_data);
+
+  std::string id_;
+  bool uninstalled_;
+  bool enabled_;
+  bool incognito_enabled_;
+  Extension::SyncType type_;
+  Version version_;
+  GURL update_url_;
+  std::string name_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SYNC_DATA_H_