ChromeFrame: Convert TaskMarshallerThroughMessageQueue to new Callback system.

base/threading/worker_pool_posix.cc

 // Copyright (c) 2011 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 "base/threading/worker_pool_posix.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 113 matching lines @@
     const std::string& name_prefix,
     int idle_seconds_before_exit)
     : name_prefix_(name_prefix),
       idle_seconds_before_exit_(idle_seconds_before_exit),
       pending_tasks_available_cv_(&lock_),
       num_idle_threads_(0),
       terminated_(false),
       num_idle_threads_cv_(NULL) {}
 
 PosixDynamicThreadPool::~PosixDynamicThreadPool() {
-  while (!pending_tasks_.empty()) {
-    PendingTask pending_task = pending_tasks_.front();
+  while (!pending_tasks_.empty())
     pending_tasks_.pop();
-  }
 }
 
 void PosixDynamicThreadPool::Terminate() {
   {
     AutoLock locked(lock_);
     DCHECK(!terminated_) << "Thread pool is already terminated.";
     terminated_ = true;
   }
   pending_tasks_available_cv_.Broadcast();
 }
@@ skipping 61 matching lines @@
       return PendingTask(FROM_HERE, base::Closure());
     }
   }
 
   PendingTask pending_task = pending_tasks_.front();
   pending_tasks_.pop();
   return pending_task;
 }
 
 }  // namespace base