Implement syncing of bookmark apps.

chrome/browser/extensions/app_sync_data.h

Index: chrome/browser/extensions/app_sync_data.h
diff --git a/chrome/browser/extensions/app_sync_data.h b/chrome/browser/extensions/app_sync_data.h
index 2e34460a19247b835f69e6b995cc96fba2cadb8f..d1164c7afc441ff40c7e17c3aee192183e5aa575 100644
--- a/chrome/browser/extensions/app_sync_data.h
+++ b/chrome/browser/extensions/app_sync_data.h
@@ -61,6 +61,14 @@ class AppSyncData {
     return launch_type_;
   }
 
+  const std::string& bookmark_app_url() const {
+    return bookmark_app_url_;
+  };
+
+  const std::string& bookmark_app_description() const {
+    return bookmark_app_description_;
+  };
+
  private:
   // Convert an AppSyncData back out to a sync structure.
   void PopulateAppSpecifics(sync_pb::AppSpecifics* specifics) const;
@@ -74,6 +82,8 @@ class AppSyncData {
   syncer::StringOrdinal app_launch_ordinal_;
   syncer::StringOrdinal page_ordinal_;
   extensions::LaunchType launch_type_;
+  std::string bookmark_app_url_;
+  std::string bookmark_app_description_;
 };
 
 }  // namespace extensions