(WONT COMMIT) BackgroundSync: Run WebCallbacks::onSuccess indirectly

content/child/background_sync/background_sync_provider_thread_proxy.cc

Index: content/child/background_sync/background_sync_provider_thread_proxy.cc
diff --git a/content/child/background_sync/background_sync_provider_thread_proxy.cc b/content/child/background_sync/background_sync_provider_thread_proxy.cc
index 6e40365f50427c11537fd6791fca87f43d0181d1..df9a980f612ddd94af525d4fdc270554c0f7ce53 100644
--- a/content/child/background_sync/background_sync_provider_thread_proxy.cc
+++ b/content/child/background_sync/background_sync_provider_thread_proxy.cc
@@ -20,6 +20,11 @@ namespace content {
 
 namespace {
 
+template <typename S, typename T>
+void RunOnSuccess(scoped_ptr<blink::WebCallbacks<S, T>> callbacks, S* results) {
+  callbacks->onSuccess(results);
+}
+
 // CallbackThreadAdapter<S,T> is a wrapper for WebCallbacks<S,T> which
 // switches to a specific thread before calling the wrapped callback's
 // onSuccess or onError methods.
@@ -39,8 +44,8 @@ class CallbackThreadAdapter : public blink::WebCallbacks<S, T> {
     // silently discarded.
     WorkerTaskRunner::Instance()->PostTask(
         worker_thread_id_,
-        base::Bind(&blink::WebCallbacks<S, T>::onSuccess,
-                   base::Owned(callbacks_.release()), results));
+        base::Bind(&RunOnSuccess<S, T>, base::Passed(callbacks_.Pass()),
+                   results));
   }
 
   virtual void onError(T* error) {