Cleaning up TODO(joi) entries in //net.

net/base/backoff_entry.cc

 // Copyright (c) 2012 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.
 
 #include "net/base/backoff_entry.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 
 #include "base/logging.h"
 #include "base/rand_util.h"
 
 namespace net {
 
 BackoffEntry::BackoffEntry(const BackoffEntry::Policy* const policy)
     : policy_(policy) {
   DCHECK(policy_);
   Reset();
 }
 
 BackoffEntry::~BackoffEntry() {
-  // TODO(joi): Remove this once our clients (e.g. URLRequestThrottlerManager)
-  // always destroy from the I/O thread.
-  DetachFromThread();
 }
 
 void BackoffEntry::InformOfRequest(bool succeeded) {
   if (!succeeded) {
     ++failure_count_;
     exponential_backoff_release_time_ = CalculateReleaseTime();
   } else {
     // We slowly decay the number of times delayed instead of
     // resetting it to 0 in order to stay stable if we receive
     // successes interleaved between lots of failures.  Note that in
@@ skipping 109 matching lines @@
     delay_int = std::min(delay_int, policy_->maximum_backoff_ms);
 
   // Never reduce previously set release horizon, e.g. due to Retry-After
   // header.
   return std::max(
       ImplGetTimeNow() + base::TimeDelta::FromMilliseconds(delay_int),
       exponential_backoff_release_time_);
 }
 
 }  // namespace net