[GCM] Adding checkin server scope in GCM Account Tracker

chrome/browser/services/gcm/gcm_account_tracker.cc

 // Copyright 2014 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/services/gcm/gcm_account_tracker.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/time/time.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 
 namespace gcm {
 
 namespace {
 const char kGCMGroupServerScope[] = "https://www.googleapis.com/auth/gcm";
+const char kGCMCheckinServerScope[] =
+    "https://www.googleapis.com/auth/android_checkin";
 const char kGCMAccountTrackerName[] = "gcm_account_tracker";
 }  // namespace
 
 GCMAccountTracker::AccountInfo::AccountInfo(const std::string& email,
                                             AccountState state)
     : email(email), state(state) {
 }
 
 GCMAccountTracker::AccountInfo::~AccountInfo() {
 }
@@ skipping 182 matching lines @@
       GetToken(iter);
   }
 }
 
 void GCMAccountTracker::GetToken(AccountInfos::iterator& account_iter) {
   DCHECK(GetTokenService());
   DCHECK_EQ(account_iter->second.state, TOKEN_NEEDED);
 
   OAuth2TokenService::ScopeSet scopes;
   scopes.insert(kGCMGroupServerScope);
+  scopes.insert(kGCMCheckinServerScope);
   scoped_ptr<OAuth2TokenService::Request> request =
       GetTokenService()->StartRequest(account_iter->first, scopes, this);
 
   pending_token_requests_.push_back(request.release());
   account_iter->second.state = GETTING_TOKEN;
 }
 
 void GCMAccountTracker::OnAccountSignedIn(const gaia::AccountIds& ids) {
   DVLOG(1) << "Account signed in: " << ids.email;
   AccountInfos::iterator iter = account_infos_.find(ids.account_key);
@@ skipping 18 matching lines @@
   iter->second.state = ACCOUNT_REMOVED;
   CompleteCollectingTokens();
 }
 
 OAuth2TokenService* GCMAccountTracker::GetTokenService() {
   DCHECK(account_tracker_->identity_provider());
   return account_tracker_->identity_provider()->GetTokenService();
 }
 
 }  // namespace gcm