Force Account Consistency off for Logout call on iOS.

google_apis/gaia/gaia_auth_fetcher.cc

Index: google_apis/gaia/gaia_auth_fetcher.cc
diff --git a/google_apis/gaia/gaia_auth_fetcher.cc b/google_apis/gaia/gaia_auth_fetcher.cc
index 38e7802bed699f15b24bbe0a05c1362283111e85..be2e2e5c692357aceede26c1fa2ea2b4a51eeb5c 100644
--- a/google_apis/gaia/gaia_auth_fetcher.cc
+++ b/google_apis/gaia/gaia_auth_fetcher.cc
@@ -195,6 +195,10 @@ void GaiaAuthFetcher::SetPendingFetch(bool pending_fetch) {
   fetch_pending_ = pending_fetch;
 }
 
+void GaiaAuthFetcher::SetLogoutHeaders(const std::string& headers) {
+  logout_headers_ = headers;
+}
+
 void GaiaAuthFetcher::CancelRequest() {
   fetcher_.reset();
   fetch_pending_ = false;
@@ -629,7 +633,7 @@ void GaiaAuthFetcher::StartListAccounts() {
 void GaiaAuthFetcher::StartLogOut() {
   DCHECK(!fetch_pending_) << "Tried to fetch two things at once!";
 
-  CreateAndStartGaiaFetcher(std::string(), std::string(), logout_gurl_,
+  CreateAndStartGaiaFetcher(std::string(), logout_headers_, logout_gurl_,
                             net::LOAD_NORMAL);
 }