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

net/base/net_util.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_BASE_NET_UTIL_H_
 #define NET_BASE_NET_UTIL_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ skipping 368 matching lines @@
 
 // Strip the portions of |url| that aren't core to the network request.
 //   - user name / password
 //   - reference section
 NET_EXPORT_PRIVATE GURL SimplifyUrlForRequest(const GURL& url);
 
 NET_EXPORT void SetExplicitlyAllowedPorts(const std::string& allowed_ports);
 
 class NET_EXPORT ScopedPortException {
  public:
-  ScopedPortException(int port);
+  explicit ScopedPortException(int port);
   ~ScopedPortException();
 
  private:
   int port_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedPortException);
 };
 
 // These are used for UMA histograms.  Any new values must be added to the end.
 enum IPv6SupportStatus {
@@ skipping 111 matching lines @@
 
 // Returns list of network interfaces except loopback interface. If an
 // interface has more than one address, a separate entry is added to
 // the list for each address.
 // Can be called only on a thread that allows IO.
 NET_EXPORT bool GetNetworkList(NetworkInterfaceList* networks);
 
 }  // namespace net
 
 #endif  // NET_BASE_NET_UTIL_H_