Propagate error messages to UI for blimp.

blimp/client/core/session/identity_source.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BLIMP_CLIENT_CORE_SESSION_IDENTITY_SOURCE_H_
 #define BLIMP_CLIENT_CORE_SESSION_IDENTITY_SOURCE_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "blimp/client/public/blimp_client_context_delegate.h"
+#include "google_apis/gaia/google_service_auth_error.h"

[David Trainor- moved to gerrit, 2016/10/07 06:58:53]

Do you still need this?

[xingliu, 2016/10/10 17:09:50]

Done.

 #include "google_apis/gaia/identity_provider.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 
 namespace blimp {
 namespace client {
 
 // IdentitySource handles OAuth2 token request and forward user sign in state
 // change to Blimp with ProfileIdentityProvider.
 class IdentitySource : public OAuth2TokenService::Consumer,
                        public OAuth2TokenService::Observer,
@@ skipping 54 matching lines @@
 
   BlimpClientContextDelegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(IdentitySource);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_CORE_SESSION_IDENTITY_SOURCE_H_