gdata: Make WeakPtrFactory the last parameter

chrome/browser/chromeos/gdata/gdata_auth_service.cc

Index: chrome/browser/chromeos/gdata/gdata_auth_service.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_auth_service.cc b/chrome/browser/chromeos/gdata/gdata_auth_service.cc
index 2b335a9fec0594b42b3f0aae33469dbc19bda90b..cb5673aefb60efffddf025b00a9b47f8468b48fa 100644
--- a/chrome/browser/chromeos/gdata/gdata_auth_service.cc
+++ b/chrome/browser/chromeos/gdata/gdata_auth_service.cc
@@ -41,8 +41,7 @@ void GDataAuthService::Initialize(Profile* profile) {
 
 GDataAuthService::GDataAuthService()
     : profile_(NULL),
-      weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
-      weak_ptr_bound_to_ui_thread_(weak_ptr_factory_.GetWeakPtr()) {
+      weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
@@ -63,11 +62,11 @@ void GDataAuthService::StartAuthentication(
         BrowserThread::UI,
         FROM_HERE,
         base::Bind(&GDataAuthService::StartAuthenticationOnUIThread,
-                   weak_ptr_bound_to_ui_thread_,
+                   weak_ptr_factory_.GetWeakPtr(),
                    registry,
                    relay_proxy,
                    base::Bind(&GDataAuthService::OnAuthCompleted,
-                              weak_ptr_bound_to_ui_thread_,
+                              weak_ptr_factory_.GetWeakPtr(),
                               relay_proxy,
                               callback)));
   } else {