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

remoting/host/linux/audio_pipe_reader.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 REMOTING_HOST_LINUX_AUDIO_PIPE_READER_H_
 #define REMOTING_HOST_LINUX_AUDIO_PIPE_READER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/message_loop.h"
@@ skipping 32 matching lines @@
 
   // MessageLoopForIO::Watcher interface.
   virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
   virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
 
  private:
   friend class base::DeleteHelper<AudioPipeReader>;
   friend class base::RefCountedThreadSafe<AudioPipeReader>;
   friend struct AudioPipeReaderTraits;
 
-  AudioPipeReader(scoped_refptr<base::SingleThreadTaskRunner> task_runner);
+  explicit AudioPipeReader(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
   virtual ~AudioPipeReader();
 
   void StartOnAudioThread(const FilePath& pipe_name);
   void StartTimer();
   void DoCapture();
   void WaitForPipeReadable();
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   int pipe_fd_;
@@ skipping 17 matching lines @@
 };
 
 // Destroys |audio_pipe_reader| on the audio thread.
 struct AudioPipeReaderTraits {
   static void Destruct(const AudioPipeReader* audio_pipe_reader);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_LINUX_AUDIO_PIPE_READER_H_