Fetch OAuth2 tokens prior to profile creation.

chrome/browser/chromeos/login/signin/oauth2_token_initializer.cc

Index: chrome/browser/chromeos/login/signin/oauth2_token_initializer.cc
diff --git a/chrome/browser/chromeos/login/signin/oauth2_token_initializer.cc b/chrome/browser/chromeos/login/signin/oauth2_token_initializer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a0725f6888846a2363aa441904c338c173f8f577
--- /dev/null
+++ b/chrome/browser/chromeos/login/signin/oauth2_token_initializer.cc
@@ -0,0 +1,41 @@
+// Copyright 2015 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.
+
+#include "chrome/browser/chromeos/login/signin/oauth2_token_initializer.h"
+
+#include "chrome/browser/browser_process.h"
+
+namespace chromeos {
+
+OAuth2TokenInitializer::OAuth2TokenInitializer() {
+}
+
+OAuth2TokenInitializer::~OAuth2TokenInitializer() {
+}
+
+void OAuth2TokenInitializer::Start(const UserContext& user_context,
+                                   const FetchOAuth2TokensCallback& callback) {
+  DCHECK(!user_context.GetAuthCode().empty());
+  callback_ = callback;
+  user_context_ = user_context;
+  oauth2_token_fetcher_.reset(new OAuth2TokenFetcher(
+      this, g_browser_process->system_request_context()));
+  oauth2_token_fetcher_->StartExchangeFromAuthCode(user_context.GetAuthCode());
+}
+
+void OAuth2TokenInitializer::OnOAuth2TokensAvailable(
+    const GaiaAuthConsumer::ClientOAuthResult& oauth2_tokens) {
+  VLOG(1) << "OAuth2 tokens fetched";
+  user_context_.SetAuthCode(std::string());
+  user_context_.SetRefreshToken(oauth2_tokens.refresh_token);
+  user_context_.SetAccessToken(oauth2_tokens.access_token);
+  callback_.Run(true, user_context_);
+}
+
+void OAuth2TokenInitializer::OnOAuth2TokensFetchFailed() {
+  LOG(WARNING) << "UserSessionManager::OnOAuth2TokensFetchFailed";

[Nikita (slow), 2015/04/23 11:14:24]

nit: Please update comment.

[achuithb, 2015/04/23 22:11:16]

Done.

+  callback_.Run(false, user_context_);
+}
+
+}  // namespace chromeos