Allow customization of HttpPostProviderFactory via ProfileSyncService

sync/internal_api/syncapi_server_connection_manager_unittest.cc

Index: sync/internal_api/syncapi_server_connection_manager_unittest.cc
diff --git a/sync/internal_api/syncapi_server_connection_manager_unittest.cc b/sync/internal_api/syncapi_server_connection_manager_unittest.cc
index 2cb3dff3c7871d67047867acf0f2fb63f585d5e2..46de1d7bdfcdfdb723508ee70478eaf2251ec1f6 100644
--- a/sync/internal_api/syncapi_server_connection_manager_unittest.cc
+++ b/sync/internal_api/syncapi_server_connection_manager_unittest.cc
@@ -58,6 +58,8 @@ class BlockingHttpPost : public HttpPostProviderInterface {
 class BlockingHttpPostFactory : public HttpPostProviderFactory {
  public:
   virtual ~BlockingHttpPostFactory() {}
+  virtual void RegisterCancelationSignal(CancelationSignal* cancelation_signal)
+      OVERRIDE {}
   virtual void Init(const std::string& user_agent) OVERRIDE {}
   virtual HttpPostProviderInterface* Create() OVERRIDE {
     return new BlockingHttpPost();