Ensure that an autorelease pool is available in worker_pool_mac's WorkerPool::PostTask

base/worker_pool_mac.mm

 // Copyright (c) 2008 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/worker_pool_mac.h"
 
 #include "base/histogram.h"
 #include "base/logging.h"
 #import "base/scoped_nsautorelease_pool.h"
 #include "base/scoped_ptr.h"
@@ skipping 78 matching lines @@
   DCHECK(!task_.get())
       << "-[TaskOperation dealloc] called without running task";
 
   [super dealloc];
 }
 
 @end  // @implementation TaskOperation
 
 bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
                           Task* task, bool task_is_slow) {
+  base::ScopedNSAutoreleasePool autorelease_pool;
+
   // Ignore |task_is_slow|, it doesn't map directly to any tunable aspect of
   // an NSOperation.
 
   DCHECK(task) << "WorkerPool::PostTask called with no task";
   if (!task) {
     return false;
   }
 
   task->SetBirthPlace(from_here);
 
@@ skipping 38 matching lines @@
   // Don't report "nothing to report".
   const size_t kUnaccountedOpsDelta = 10;
   if (hung_ops.size() > 0 || outstanding_delta > kUnaccountedOpsDelta) {
     UMA_HISTOGRAM_COUNTS_100("OSX.HungWorkers", hung_ops.size());
     UMA_HISTOGRAM_COUNTS_100("OSX.OutstandingDelta", outstanding_delta);
     UMA_HISTOGRAM_COUNTS_100("OSX.RunningOps", running_ops);
   }
 
   return true;
 }