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

net/tools/gdig/file_net_log.h

 // 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.
 
 #ifndef NET_TOOLS_GDIG_FILE_NET_LOG_H_
 #define NET_TOOLS_GDIG_FILE_NET_LOG_H_
 
 #include <string>
 
 #include "base/atomic_sequence_num.h"
 #include "base/basictypes.h"
 #include "base/synchronization/lock.h"
 #include "base/time.h"
 #include "net/base/net_log.h"
 
 namespace net {
 
 // FileNetLog is a simple implementation of NetLog that prints out all
 // the events received into the stream passed to the constructor.
 class FileNetLog : public NetLog {
  public:
-  explicit FileNetLog(FILE* destination, LogLevel level);
+  FileNetLog(FILE* destination, LogLevel level);
   virtual ~FileNetLog();
 
  private:
   // NetLog implementation:
   virtual void OnAddEntry(const net::NetLog::Entry& entry) OVERRIDE;
   virtual uint32 NextID() OVERRIDE;
   virtual LogLevel GetLogLevel() const OVERRIDE;
   virtual void AddThreadSafeObserver(ThreadSafeObserver* observer,
                                      LogLevel log_level) OVERRIDE;
   virtual void SetObserverLogLevel(ThreadSafeObserver* observer,
                                    LogLevel log_level) OVERRIDE;
   virtual void RemoveThreadSafeObserver(ThreadSafeObserver* observer) OVERRIDE;
 
   base::AtomicSequenceNumber sequence_number_;
   const NetLog::LogLevel log_level_;
 
   FILE* const destination_;
   base::Lock lock_;
 
   base::Time first_event_time_;
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_GDIG_FILE_NET_LOG_H_