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

chrome/common/service_process_util_mac.mm

Index: chrome/common/service_process_util_mac.mm
diff --git a/chrome/common/service_process_util_mac.mm b/chrome/common/service_process_util_mac.mm
index 7923a1a987893e2da01fb63a0357160729cda64d..df2bc22fcbcde5d95079e6b645433795c2a6f7ec 100644
--- a/chrome/common/service_process_util_mac.mm
+++ b/chrome/common/service_process_util_mac.mm
@@ -120,7 +120,8 @@ bool ForceServiceProcessShutdown(const std::string& /* version */,
   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;
@@ -177,9 +178,9 @@ 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;
   }