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

jingle/glue/fake_network_manager.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 JINGLE_GLUE_FAKE_NETWORK_MANAGER_H_
 #define JINGLE_GLUE_FAKE_NETWORK_MANAGER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/net_util.h"
 #include "third_party/libjingle/source/talk/base/network.h"
 
 namespace jingle_glue {
 
 // FakeNetworkManager always returns one interface with the IP address
 // specified in the constructor.
 class FakeNetworkManager : public talk_base::NetworkManager {
  public:
-  FakeNetworkManager(const net::IPAddressNumber& address);
+  explicit FakeNetworkManager(const net::IPAddressNumber& address);
   virtual ~FakeNetworkManager();
 
   // talk_base::NetworkManager interface.
   virtual void StartUpdating() OVERRIDE;
   virtual void StopUpdating() OVERRIDE;
   virtual void GetNetworks(NetworkList* networks) const OVERRIDE;
 
  protected:
   void SendNetworksChangedSignal();
 
   bool started_;
   scoped_ptr<talk_base::Network> network_;
 
   base::WeakPtrFactory<FakeNetworkManager> weak_factory_;
 };
 
 }  // namespace jingle_glue
 
 #endif  // JINGLE_GLUE_FAKE_NETWORK_MANAGER_H_