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

webkit/glue/worker_task_runner.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/callback.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "webkit/glue/worker_task_runner.h"
 
 using WebKit::WebWorkerRunLoop;
 
 namespace {
 
 class RunClosureTask : public WebWorkerRunLoop::Task {
  public:
-  RunClosureTask(const base::Closure& task) : task_(task) {}
+  explicit RunClosureTask(const base::Closure& task) : task_(task) {}
   virtual ~RunClosureTask() {}
   virtual void Run() {
     task_.Run();
   }
  private:
   base::Closure task_;
 };
 
 } // unnamed namespace
 
@@ skipping 64 matching lines @@
   {
     base::AutoLock locker(loop_map_lock_);
     DCHECK(loop_map_[CurrentWorkerId()] == loop);
     loop_map_.erase(CurrentWorkerId());
   }
   delete current_tls_.Get();
   current_tls_.Set(NULL);
 }
 
 }  // namespace webkit_glue