Add support for Pull Queues to prod implementation.

impl/dummy/dummy.go

Index: impl/dummy/dummy.go
diff --git a/impl/dummy/dummy.go b/impl/dummy/dummy.go
index 30e54b7f13b780d256b292476557422fbdde4792..ac1fc2c095954d007345aa8abb5ba20389b3aab2 100644
--- a/impl/dummy/dummy.go
+++ b/impl/dummy/dummy.go
@@ -125,11 +125,14 @@ func Memcache() memcache.RawInterface { return dummyMCInst }
 
 type tq struct{}
 
-func (tq) AddMulti([]*taskqueue.Task, string, taskqueue.RawTaskCB) error { panic(ni()) }
-func (tq) DeleteMulti([]*taskqueue.Task, string, taskqueue.RawCB) error  { panic(ni()) }
-func (tq) Purge(string) error                                            { panic(ni()) }
-func (tq) Stats([]string, taskqueue.RawStatsCB) error                    { panic(ni()) }
-func (tq) GetTestable() taskqueue.Testable                               { return nil }
+func (tq) AddMulti([]*taskqueue.Task, string, taskqueue.RawTaskCB) error  { panic(ni()) }
+func (tq) DeleteMulti([]*taskqueue.Task, string, taskqueue.RawCB) error   { panic(ni()) }
+func (tq) Lease(int, string, int) ([]*taskqueue.Task, error)              { panic(ni()) }
+func (tq) LeaseByTag(int, string, int, string) ([]*taskqueue.Task, error) { panic(ni()) }
+func (tq) ModifyLease(*taskqueue.Task, string, int) error                 { panic(ni()) }
+func (tq) Purge(string) error                                             { panic(ni()) }
+func (tq) Stats([]string, taskqueue.RawStatsCB) error                     { panic(ni()) }
+func (tq) GetTestable() taskqueue.Testable                                { return nil }
 
 var dummyTQInst = tq{}