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

content/browser/mach_broker_mac.cc

 // 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.
 
 #include "content/browser/mach_broker_mac.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 14 matching lines @@
 
 namespace {
 // Prints a string representation of a Mach error code.
 std::string MachErrorCode(kern_return_t err) {
   return base::StringPrintf("0x%x %s", err, mach_error_string(err));
 }
 }  // namespace
 
 class MachListenerThreadDelegate : public base::PlatformThread::Delegate {
  public:
-  MachListenerThreadDelegate(MachBroker* broker) : broker_(broker) {
+  explicit MachListenerThreadDelegate(MachBroker* broker) : broker_(broker) {
     DCHECK(broker_);
     std::string port_name = MachBroker::GetMachPortName();
 
     // Create the receive port in the constructor, not in ThreadMain().  It is
     // important to create and register the receive port before starting the
     // thread so that child processes will always have someone who's listening.
     receive_port_.reset(new base::ReceivePort(port_name.c_str()));
   }
 
   // Implement |PlatformThread::Delegate|.
@@ skipping 172 matching lines @@
                  NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, NOTIFICATION_RENDERER_PROCESS_TERMINATED,
                  NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, NOTIFICATION_CHILD_PROCESS_CRASHED,
                  NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, NOTIFICATION_CHILD_PROCESS_HOST_DISCONNECTED,
                  NotificationService::AllBrowserContextsAndSources());
 }
 
 }  // namespace content