Make the mac service process handling code clean itself up properly as far as launchd is concerned.

chrome/common/service_process_util_mac.mm

 // 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 "chrome/common/service_process_util_posix.h"
 
 #import <Foundation/Foundation.h>
 #include <launch.h>
 
 #include <vector>
@@ skipping 102 matching lines @@
   return IPC::ChannelHandle(socket_path);
 }
 
 bool ForceServiceProcessShutdown(const std::string& /* version */,
                                  base::ProcessId /* process_id */) {
   base::mac::ScopedNSAutoreleasePool pool;
   CFStringRef label = base::mac::NSToCFCast(GetServiceProcessLaunchDLabel());
   CFErrorRef err = NULL;
   bool ret = Launchd::GetInstance()->RemoveJob(label, &err);
   if (!ret) {
-    LOG(ERROR) << "ForceServiceProcessShutdown: " << err;
+    LOG(ERROR) << "ForceServiceProcessShutdown: " << err << " "
+               << base::SysCFStringRefToUTF8(label);
     CFRelease(err);
   }
   return ret;
 }
 
 bool GetServiceProcessData(std::string* version, base::ProcessId* pid) {
   base::mac::ScopedNSAutoreleasePool pool;
   CFStringRef label = base::mac::NSToCFCast(GetServiceProcessLaunchDLabel());
   scoped_nsobject<NSDictionary> launchd_conf(base::mac::CFToNSCast(
       Launchd::GetInstance()->CopyJobDictionary(label)));
@@ skipping 36 matching lines @@
      *pid = [ns_pid intValue];
     }
   }
   return true;
 }
 
 bool ServiceProcessState::Initialize() {
   CFErrorRef err = NULL;
   CFDictionaryRef dict =
       Launchd::GetInstance()->CopyDictionaryByCheckingIn(&err);
-
   if (!dict) {
-    LOG(ERROR) << "CopyLaunchdDictionaryByCheckingIn: " << err;
+    LOG(ERROR) << "ServiceProcess must be launched by launchd. "
+               << "CopyLaunchdDictionaryByCheckingIn: " << err;
     CFRelease(err);
     return false;
   }
   state_->launchd_conf_.reset(dict);
   return true;
 }
 
 IPC::ChannelHandle ServiceProcessState::GetServiceProcessChannel() {
   CHECK(state_);
   NSDictionary *ns_launchd_conf = base::mac::CFToNSCast(state_->launchd_conf_);
@@ skipping 245 matching lines @@
       CFErrorRef err = NULL;
       if (!Launchd::GetInstance()->RemoveJob(label, &err)) {
         base::mac::ScopedCFTypeRef<CFErrorRef> scoped_err(err);
         LOG(ERROR) << "RemoveJob " << err;
         // Exiting with zero, so launchd doesn't restart the process.
         exit(0);
       }
     }
   }
 }