Remove explicit keyword from multi-argument constructors

content/common/process_watcher_posix.cc

 // Copyright (c) 2009 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 "content/common/process_watcher.h"
 
 #include <errno.h>
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/wait.h>
@@ skipping 14 matching lines @@
     return true;
   }
 
   return false;
 }
 
 // A thread class which waits for the given child to exit and reaps it.
 // If the child doesn't exit within a couple of seconds, kill it.
 class BackgroundReaper : public base::PlatformThread::Delegate {
  public:
-  explicit BackgroundReaper(pid_t child, unsigned timeout)
+  BackgroundReaper(pid_t child, unsigned timeout)
       : child_(child),
         timeout_(timeout) {
   }
 
   void ThreadMain() {
     WaitForChildToDie();
     delete this;
   }
 
   void WaitForChildToDie() {
@@ skipping 50 matching lines @@
 
 // static
 void ProcessWatcher::EnsureProcessGetsReaped(base::ProcessHandle process) {
   // If the child is already dead, then there's nothing to do.
   if (IsChildDead(process))
     return;
 
   BackgroundReaper* reaper = new BackgroundReaper(process, 0);
   base::PlatformThread::CreateNonJoinable(0, reaper);
 }