sync: Add GetAllSyncData to sync/api

chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc

Index: chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
diff --git a/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc b/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
index 67d70558a89724b932b31edbb1349743678fc94c..17c7bbf124953015b7c36bea5242700f7c2e99de 100644
--- a/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
+++ b/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
@@ -154,6 +154,10 @@ class TestChangeProcessor : public syncer::SyncChangeProcessor {
     return syncer::SyncError();
   }
 
+  virtual syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const {
+    return syncer::SyncDataList();
+  }
+
   size_t change_list_size() { return change_map_.size(); }
 
   bool ContainsId(const std::string& id) {
@@ -187,6 +191,10 @@ class SyncChangeProcessorDelegate : public syncer::SyncChangeProcessor {
     return recipient_->ProcessSyncChanges(from_here, change_list);
   }
 
+  virtual syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const {
+    return recipient_->GetAllSyncData(type);
+  }
+
  private:
   // The recipient of all sync changes.
   SyncChangeProcessor* recipient_;