Delay loading the NTP after sign in until MergeSession has been performed in

chrome/browser/signin/google_auto_login_helper.cc

 // Copyright 2013 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/signin/google_auto_login_helper.h"
 
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/signin/profile_oauth2_token_service.h"
+#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "content/public/browser/notification_service.h"
 #include "google_apis/gaia/gaia_auth_fetcher.h"
 #include "google_apis/gaia/gaia_constants.h"
 
-GoogleAutoLoginHelper::GoogleAutoLoginHelper(Profile* profile)
-    : profile_(profile) {}
+GoogleAutoLoginHelper::GoogleAutoLoginHelper(Profile* profile,
+                                             Observer* observer)
+    : profile_(profile) {
+  if (observer)
+    AddObserver(observer);
+}
 
 GoogleAutoLoginHelper::~GoogleAutoLoginHelper() {
   DCHECK(accounts_.empty());
 }
 
 void GoogleAutoLoginHelper::LogIn() {
-  // This is the code path for non-mirror world.
-  uber_token_fetcher_.reset(CreateNewUbertokenFetcher());
-  uber_token_fetcher_->StartFetchingToken();
-  DCHECK(accounts_.empty());
+  ProfileOAuth2TokenService* token_service =
+      ProfileOAuth2TokenServiceFactory::GetForProfile(profile_);
+  LogIn(token_service->GetPrimaryAccountId());
 }
 
 void GoogleAutoLoginHelper::LogIn(const std::string& account_id) {
-  if (uber_token_fetcher_.get()) {
-    accounts_.push_back(account_id);
-  } else {
-    uber_token_fetcher_.reset(CreateNewUbertokenFetcher());
-    uber_token_fetcher_->StartFetchingToken(account_id);
-  }
+  accounts_.push_back(account_id);
+  if (accounts_.size() == 1)
+    StartFetching();
+}
+
+void GoogleAutoLoginHelper::AddObserver(Observer* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void GoogleAutoLoginHelper::RemoveObserver(Observer* observer) {
+  observer_list_.RemoveObserver(observer);
 }
 
 void GoogleAutoLoginHelper::OnUbertokenSuccess(const std::string& uber_token) {
-  VLOG(1) << "GoogleAutoLoginHelper::OnUbertokenSuccess";
-  gaia_auth_fetcher_.reset(CreateNewGaiaAuthFetcher());
+  VLOG(1) << "GoogleAutoLoginHelper::OnUbertokenSuccess"
+          << " account=" << accounts_.front();
+  gaia_auth_fetcher_.reset(
+      new GaiaAuthFetcher(this, GaiaConstants::kChromeSource,
+                          profile_->GetRequestContext()));
   gaia_auth_fetcher_->StartMergeSession(uber_token);
 }
 
 void GoogleAutoLoginHelper::OnUbertokenFailure(
     const GoogleServiceAuthError& error) {
-  VLOG(1) << "Failed to retrieve ubertoken, error: " << error.ToString();
-  if (base::MessageLoop::current()) {
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
-  } else {
-    delete this;
-  }
+  VLOG(1) << "Failed to retrieve ubertoken"
+          << " account=" << accounts_.front()
+          << " error=" << error.ToString();
+  const std::string account_id = accounts_.front();
+  MergeNextAccount();
+  SignalComplete(account_id, error);
 }
 
 void GoogleAutoLoginHelper::OnMergeSessionSuccess(const std::string& data) {
-  DVLOG(1) << "MergeSession successful." << data;
-  if (accounts_.empty()) {
-    if (base::MessageLoop::current()) {
-      base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
-    } else {
-      delete this;
-    }
-  } else {
-    uber_token_fetcher_.reset(CreateNewUbertokenFetcher());
-    uber_token_fetcher_->StartFetchingToken(accounts_.front());
-    accounts_.pop_front();
-  }
+  DVLOG(1) << "MergeSession successful account=" << accounts_.front();
+  const std::string account_id = accounts_.front();
+  MergeNextAccount();
+  SignalComplete(account_id, GoogleServiceAuthError::AuthErrorNone());
 }
 
 void GoogleAutoLoginHelper::OnMergeSessionFailure(
     const GoogleServiceAuthError& error) {
-  VLOG(1) << "Failed MergeSession request, error: " << error.ToString();
-  // TODO(acleung): Depending on the return error we should probably
-  // take different actions instead of just throw our hands up.
+  VLOG(1) << "Failed MergeSession"
+          << " account=" << accounts_.front()
+          << " error=" << error.ToString();
+  const std::string account_id = accounts_.front();
+  MergeNextAccount();
+  SignalComplete(account_id, error);
+}
 
-  // Clearning pending accounts for now.
-  accounts_.clear();
+void GoogleAutoLoginHelper::StartFetching() {
+  uber_token_fetcher_.reset(new UbertokenFetcher(profile_, this));
+  uber_token_fetcher_->StartFetchingToken(accounts_.front());
+}
 
-  if (base::MessageLoop::current()) {
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
+void GoogleAutoLoginHelper::SignalComplete(
+    const std::string& account_id,
+    const GoogleServiceAuthError& error) {
+  // Its possible for the observer to delete |this| object.  Don't access
+  // access any members after this calling the observer.  This method should
+  // be the last call in any other method.
+  FOR_EACH_OBSERVER(Observer, observer_list_,
+                    MergeSessionCompleted(account_id, error));
+}
+
+void GoogleAutoLoginHelper::MergeNextAccount() {
+  gaia_auth_fetcher_.reset();
+  accounts_.pop_front();
+  if (accounts_.empty()) {
+    uber_token_fetcher_.reset();
   } else {
-    delete this;
+    StartFetching();
   }
 }
-
-UbertokenFetcher* GoogleAutoLoginHelper::CreateNewUbertokenFetcher() {
-  return new UbertokenFetcher(profile_, this);
-}
-
-GaiaAuthFetcher* GoogleAutoLoginHelper::CreateNewGaiaAuthFetcher() {
- return new GaiaAuthFetcher(
-      this, GaiaConstants::kChromeSource, profile_->GetRequestContext());
-}
-