libchrome: Several upstreamable fixes from libchrome

base/threading/worker_pool_posix.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 "base/threading/worker_pool_posix.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 35 matching lines @@
 WorkerPoolImpl::WorkerPoolImpl()
     : pool_(new base::PosixDynamicThreadPool("WorkerPool",
                                              kIdleSecondsBeforeExit)) {}
 
 WorkerPoolImpl::~WorkerPoolImpl() {
   pool_->Terminate();
 }
 
 void WorkerPoolImpl::PostTask(const tracked_objects::Location& from_here,
                               const base::Closure& task,
-                              bool task_is_slow) {
+                              bool /*task_is_slow*/) {
   pool_->PostTask(from_here, task);
 }
 
 base::LazyInstance<WorkerPoolImpl> g_lazy_worker_pool =
     LAZY_INSTANCE_INITIALIZER;
 
 class WorkerThread : public PlatformThread::Delegate {
  public:
   WorkerThread(const std::string& name_prefix,
                base::PosixDynamicThreadPool* pool)
@@ skipping 118 matching lines @@
       return PendingTask(FROM_HERE, base::Closure());
     }
   }
 
   PendingTask pending_task = pending_tasks_.front();
   pending_tasks_.pop();
   return pending_task;
 }
 
 }  // namespace base