Remove explicit keyword from multi-argument constructors

remoting/protocol/content_description.h

 // Copyright (c) 2011 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_PROTOCOL_CONTENT_DESCRIPTION_H_
 #define REMOTING_PROTOCOL_CONTENT_DESCRIPTION_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "remoting/protocol/session_config.h"
 #include "third_party/libjingle/source/talk/p2p/base/sessiondescription.h"
 
 namespace buzz {
 class XmlElement;
 }  // namespace buzz
 
 namespace remoting {
 namespace protocol {
 
 // ContentDescription used for chromoting sessions. It contains the information
 // from the content description stanza in the session intialization handshake.
 //
 // This class also provides a type abstraction so that the Chromotocol Session
 // interface does not need to depend on libjingle.
 class ContentDescription : public cricket::ContentDescription {
  public:
-  explicit ContentDescription(const CandidateSessionConfig* config,
-                              const std::string& auth_token,
-                              const std::string& master_key,
-                              const std::string& certificate);
+  ContentDescription(const CandidateSessionConfig* config,
+                     const std::string& auth_token,
+                     const std::string& master_key,
+                     const std::string& certificate);
   virtual ~ContentDescription();
 
   const CandidateSessionConfig* config() const {
     return candidate_config_.get();
   }
 
   const std::string& auth_token() const { return auth_token_; }
   const std::string& master_key() const { return master_key_; }
   const std::string& certificate() const { return certificate_; }
 
@@ skipping 11 matching lines @@
   // Master key used for the session encrypted with the hosts key.
   std::string master_key_;
 
   std::string certificate_;
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CONTENT_DESCRIPTION_H_