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

base/mach_ipc_mac.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 BASE_MACH_IPC_MAC_H_
 #define BASE_MACH_IPC_MAC_H_
 
 #include <mach/mach.h>
 #include <mach/message.h>
 #include <servers/bootstrap.h>
@@ skipping 71 matching lines @@
   MachMsgPortDescriptor(mach_port_t in_name,
                         mach_msg_type_name_t in_disposition) {
     name = in_name;
     pad1 = 0;
     pad2 = 0;
     disposition = in_disposition;
     type = MACH_MSG_PORT_DESCRIPTOR;
   }
 
   // For passing send rights to a port
-  MachMsgPortDescriptor(mach_port_t in_name) {
+  explicit MachMsgPortDescriptor(mach_port_t in_name) {
     name = in_name;
     pad1 = 0;
     pad2 = 0;
     disposition = MACH_MSG_TYPE_PORT_SEND;
     type = MACH_MSG_PORT_DESCRIPTOR;
   }
 
   // Copy constructor
   MachMsgPortDescriptor(const MachMsgPortDescriptor& desc) {
     name = desc.name;
@@ skipping 214 matching lines @@
 // Note that unless the calling task has send rights to the passed task port,
 // this will fail unless the calling task is running as root.
 kern_return_t BASE_EXPORT GetNumberOfMachPorts(mach_port_t task_port,
                                                int* port_count);
 
 }  // namespace mac
 
 }  // namespace base
 
 #endif // BASE_MACH_IPC_MAC_H_