Add missing (and remove superfluous) 'explicit' from constructors.

base/threading/worker_pool.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.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/lazy_instance.h"
 #include "base/task_runner.h"
 #include "base/threading/post_task_and_reply_impl.h"
 #include "base/tracked_objects.h"
 
 namespace base {
 
 namespace {
 
 class PostTaskAndReplyWorkerPool : public internal::PostTaskAndReplyImpl {
  public:
-  PostTaskAndReplyWorkerPool(bool task_is_slow) : task_is_slow_(task_is_slow) {
+  explicit PostTaskAndReplyWorkerPool(bool task_is_slow)
+      : task_is_slow_(task_is_slow) {
   }
 
  private:
   virtual bool PostTask(const tracked_objects::Location& from_here,
                         const Closure& task) OVERRIDE {
     return WorkerPool::PostTask(from_here, task, task_is_slow_);
   }
 
   bool task_is_slow_;
 };
 
 // WorkerPoolTaskRunner ---------------------------------------------
 // A TaskRunner which posts tasks to a WorkerPool with a
 // fixed ShutdownBehavior.
 //
 // Note that this class is RefCountedThreadSafe (inherited from TaskRunner).
 class WorkerPoolTaskRunner : public TaskRunner {
  public:
-  WorkerPoolTaskRunner(bool tasks_are_slow);
+  explicit WorkerPoolTaskRunner(bool tasks_are_slow);
 
   // TaskRunner implementation
   virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
                                const Closure& task,
                                TimeDelta delay) OVERRIDE;
   virtual bool RunsTasksOnCurrentThread() const OVERRIDE;
 
  private:
   virtual ~WorkerPoolTaskRunner();
 
@@ skipping 57 matching lines @@
       from_here, task, reply);
 }
 
 // static
 const scoped_refptr<TaskRunner>&
 WorkerPool::GetTaskRunner(bool tasks_are_slow) {
   return g_taskrunners.Get().taskrunners_[tasks_are_slow];
 }
 
 }  // namespace base