Fix for bug 148191. Remove now obsolete references to 'session-logout'. r=morse, sr= alecf.

modules/libpref/src/nsPrefService.cpp

@@ -148,9 +148,6 @@ nsresult nsPrefService::Init()
     rv = observerService->AddObserver(this, "profile-before-change", PR_TRUE);
     if (NS_SUCCEEDED(rv)) {
       rv = observerService->AddObserver(this, "profile-do-change", PR_TRUE);
-      if (NS_SUCCEEDED(rv)) {
-        rv = observerService->AddObserver(this, "session-logout", PR_TRUE);
-      }
     }
   }
   return(rv);
@@ -172,8 +169,6 @@ NS_IMETHODIMP nsPrefService::Observe(nsISupports *aSubject, const char *aTopic,
   } else if (!nsCRT::strcmp(aTopic, "profile-do-change")) {
     ResetUserPrefs();
     rv = ReadUserPrefs(nsnull);
-  } else if (!nsCRT::strcmp(aTopic, "session-logout")) {
-    rv = SavePrefFile(nsnull);
   }
   return rv;
 }