Remove explicit keyword from multi-argument constructors

remoting/client/plugin/chromoting_scriptable_object.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.
 
 // This implements the JavaScript class entrypoint for the plugin instance.
 // The Javascript API is defined as follows.
 //
 // interface ChromotingScriptableObject {
 //
 //   // Chromoting session API version (for this plugin).
@@ skipping 164 matching lines @@
 
   // Sends an IQ stanza, serialized as an xml string, into Javascript for
   // handling.
   void SendIq(const std::string& request_xml);
 
  private:
   typedef std::map<std::string, int> PropertyNameMap;
   typedef pp::Var (ChromotingScriptableObject::*MethodHandler)(
       const std::vector<pp::Var>& args, pp::Var* exception);
   struct PropertyDescriptor {
-    explicit PropertyDescriptor(const std::string& n, pp::Var a)
+    PropertyDescriptor(const std::string& n, pp::Var a)
         : type(NONE), name(n), attribute(a), method(NULL) {
     }
 
-    explicit PropertyDescriptor(const std::string& n, MethodHandler m)
+    PropertyDescriptor(const std::string& n, MethodHandler m)
         : type(NONE), name(n), method(m) {
     }
 
     enum Type {
       NONE,
       ATTRIBUTE,
       METHOD,
     } type;
 
     std::string name;
@@ skipping 33 matching lines @@
   PropertyNameMap property_names_;
   std::vector<PropertyDescriptor> properties_;
   scoped_refptr<PepperXmppProxy> xmpp_proxy_;
 
   ChromotingInstance* instance_;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_PLUGIN_CHROMOTING_SCRIPTABLE_OBJECT_H_