diff -r 000000000000 -r 6474c204b198 mobile/android/base/sync/repositories/delegates/DeferredRepositorySessionStoreDelegate.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/sync/repositories/delegates/DeferredRepositorySessionStoreDelegate.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,57 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.sync.repositories.delegates;
+
+import java.util.concurrent.ExecutorService;
+
+public class DeferredRepositorySessionStoreDelegate implements
+    RepositorySessionStoreDelegate {
+  protected final RepositorySessionStoreDelegate inner;
+  protected final ExecutorService                executor;
+
+  public DeferredRepositorySessionStoreDelegate(
+      RepositorySessionStoreDelegate inner, ExecutorService executor) {
+    this.inner = inner;
+    this.executor = executor;
+  }
+
+  @Override
+  public void onRecordStoreSucceeded(final String guid) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        inner.onRecordStoreSucceeded(guid);
+      }
+    });
+  }
+
+  @Override
+  public void onRecordStoreFailed(final Exception ex, final String guid) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        inner.onRecordStoreFailed(ex, guid);
+      }
+    });
+  }
+
+  @Override
+  public RepositorySessionStoreDelegate deferredStoreDelegate(ExecutorService newExecutor) {
+    if (newExecutor == executor) {
+      return this;
+    }
+    throw new IllegalArgumentException("Can't re-defer this delegate.");
+  }
+
+  @Override
+  public void onStoreCompleted(final long storeEnd) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        inner.onStoreCompleted(storeEnd);
+      }
+    });
+  }
+}