Pass Device ID in the oauth2/token request. Keep Device ID in local state on Chrome OS.

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

 // 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());
+  if (user_context.GetDeviceId().empty())
+    NOTREACHED() << "Device ID is not set";
+  oauth2_token_fetcher_->StartExchangeFromAuthCode(user_context.GetAuthCode(),
+                                                   user_context.GetDeviceId());
 }
 
 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) << "OAuth2TokenInitializer - OAuth2 token fetch failed";
   callback_.Run(false, user_context_);
 }
 
 }  // namespace chromeos