LogDog: Add collector service implementation.

common/retry/defaults.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package retry
 
 import (
         "time"
 )
 
 // defaultIterator defines a template for the default retry parameters that
 // should be used throughout the program.
 var defaultIteratorTemplate = ExponentialBackoff{
         Limited: Limited{
                 Delay:   200 * time.Millisecond,
                 Retries: 10,
         },
         MaxDelay:   10 * time.Second,
         Multiplier: 2,
 }
 
-// Default returns a new instance of the default iterator configuration.
+// Default is a Generator that returns a new instance of the default iterator
+// configuration.
 func Default() Iterator {
         it := defaultIteratorTemplate
         return &it
 }