Out of line cleanups for Mac.

chrome/browser/mach_broker_mac.cc

 // Copyright (c) 2009 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 "chrome/browser/mach_broker_mac.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/mach_ipc_mac.h"
 #include "base/string_util.h"
@@ skipping 110 matching lines @@
 };
 
 // Returns the global MachBroker.
 MachBroker* MachBroker::GetInstance() {
   return Singleton<MachBroker, LeakySingletonTraits<MachBroker> >::get();
 }
 
 MachBroker::MachBroker() : listener_thread_started_(false) {
 }
 
+MachBroker::~MachBroker() {}
+
 void MachBroker::PrepareForFork() {
   if (!listener_thread_started_) {
     listener_thread_started_ = true;
 
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE, new RegisterNotificationTask(this));
 
     // Intentional leak.  This thread is never joined or reaped.
     base::PlatformThread::CreateNonJoinable(
         0, new MachListenerThreadDelegate(this));
@@ skipping 92 matching lines @@
 #endif
       ".rohitfork.%d";
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   const bool is_child = command_line.HasSwitch(switches::kProcessType);
 
   // In non-browser (child) processes, use the parent's pid.
   const pid_t pid = is_child ? getppid() : getpid();
   return StringPrintf(kFormatString, pid);
 }