Force Account Consistency off for Logout call on iOS.

google_apis/gaia/gaia_auth_fetcher.h

Index: google_apis/gaia/gaia_auth_fetcher.h
diff --git a/google_apis/gaia/gaia_auth_fetcher.h b/google_apis/gaia/gaia_auth_fetcher.h
index 6a92a21efc6b521f5b0a72a866227d9057840249..ced26015f73e170d9d973a2dc9302698da2f1aed 100644
--- a/google_apis/gaia/gaia_auth_fetcher.h
+++ b/google_apis/gaia/gaia_auth_fetcher.h
@@ -228,6 +228,9 @@ class GaiaAuthFetcher : public net::URLFetcherDelegate {
 
   void SetPendingFetch(bool pending_fetch);
 
+  // Set the headers to use during the Logout call.
+  void SetLogoutHeaders(const std::string& headers);
+
  private:
   // The format of the POST body for IssueAuthToken.
   static const char kIssueAuthTokenFormat[];
@@ -430,6 +433,9 @@ class GaiaAuthFetcher : public net::URLFetcherDelegate {
   std::string requested_service_;
   bool fetch_pending_;
 
+  // Headers used during the Logout call.
+  std::string logout_headers_;
+
   friend class GaiaAuthFetcherTest;
   FRIEND_TEST_ALL_PREFIXES(GaiaAuthFetcherTest, CaptchaParse);
   FRIEND_TEST_ALL_PREFIXES(GaiaAuthFetcherTest, AccountDeletedError);