Style cleanup in preparation for auto-linting base/.

base/worker_pool_unittest.cc

 // 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/task.h"
 #include "base/waitable_event.h"
 #include "base/worker_pool.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 using base::WaitableEvent;
 
 typedef PlatformTest WorkerPoolTest;
 
 namespace {
 
 class PostTaskTestTask : public Task {
  public:
-  PostTaskTestTask(WaitableEvent* event) : event_(event) {
+  explicit PostTaskTestTask(WaitableEvent* event) : event_(event) {
   }
 
   void Run() {
     event_->Signal();
   }
 
  private:
   WaitableEvent* event_;
 };
 
 TEST_F(WorkerPoolTest, PostTask) {
   WaitableEvent test_event(false, false);
   WaitableEvent long_test_event(false, false);
   bool signaled;
 
   WorkerPool::PostTask(FROM_HERE, new PostTaskTestTask(&test_event), false);
   WorkerPool::PostTask(FROM_HERE, new PostTaskTestTask(&long_test_event), true);
 
   signaled = test_event.Wait();
   EXPECT_TRUE(signaled);
   signaled = long_test_event.Wait();
   EXPECT_TRUE(signaled);
 }
 
 } // namespace