Chrome proxy refactoring.

chrome/service/cloud_print/cloud_print_proxy_backend.cc

 // Copyright (c) 2011 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/service/cloud_print/cloud_print_proxy_backend.h"
 
 #include <map>
 #include <vector>
 
 #include "base/file_util.h"
-#include "base/md5.h"
 #include "base/rand_util.h"
-#include "base/string_number_conversions.h"
-#include "base/string_split.h"
-#include "base/stringprintf.h"
-#include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/common/net/gaia/gaia_oauth_client.h"
 #include "chrome/common/net/gaia/gaia_urls.h"
+#include "chrome/service/cloud_print/cloud_print_auth.h"
+#include "chrome/service/cloud_print/cloud_print_connector.h"
 #include "chrome/service/cloud_print/cloud_print_consts.h"
 #include "chrome/service/cloud_print/cloud_print_helpers.h"
 #include "chrome/service/cloud_print/cloud_print_token_store.h"
-#include "chrome/service/cloud_print/cloud_print_url_fetcher.h"
-#include "chrome/service/cloud_print/printer_job_handler.h"
 #include "chrome/service/gaia/service_gaia_authenticator.h"
 #include "chrome/service/net/service_url_request_context.h"
 #include "chrome/service/service_process.h"
 #include "googleurl/src/gurl.h"
 #include "grit/generated_resources.h"
 #include "jingle/notifier/base/notifier_options.h"
 #include "jingle/notifier/listener/mediator_thread_impl.h"
 #include "jingle/notifier/listener/talk_mediator_impl.h"
-#include "net/url_request/url_request_status.h"
 #include "ui/base/l10n/l10n_util.h"
 
 // The real guts of CloudPrintProxyBackend, to keep the public client API clean.
 class CloudPrintProxyBackend::Core
     : public base::RefCountedThreadSafe<CloudPrintProxyBackend::Core>,
-      public CloudPrintURLFetcherDelegate,
-      public cloud_print::PrintServerWatcherDelegate,
-      public PrinterJobHandlerDelegate,
-      public notifier::TalkMediator::Delegate,
-      public gaia::GaiaOAuthClient::Delegate {
+      public CloudPrintAuth::Client,
+      public CloudPrintConnector::Client,
+      public notifier::TalkMediator::Delegate {
  public:
   // It is OK for print_server_url to be empty. In this case system should
   // use system default (local) print server.
   Core(CloudPrintProxyBackend* backend,
+       const std::string& proxy_id,
        const GURL& cloud_print_server_url,
        const DictionaryValue* print_system_settings,
        const gaia::OAuthClientInfo& oauth_client_info,
        bool enable_job_poll);
 
   // Note:
   //
   // The Do* methods are the various entry points from CloudPrintProxyBackend
   // It calls us on a dedicated thread to actually perform synchronous
   // (and potentially blocking) operations.
@@ skipping 15 matching lines @@
   void DoInitializeWithRobotAuthCode(const std::string& robot_oauth_auth_code,
                                      const std::string& robot_email,
                                      const std::string& proxy_id);
 
   // Called on the CloudPrintProxyBackend core_thread_ to perform
   // shutdown.
   void DoShutdown();
   void DoRegisterSelectedPrinters(
       const printing::PrinterList& printer_list);
 
-  // CloudPrintURLFetcher::Delegate implementation.
-  virtual CloudPrintURLFetcher::ResponseAction HandleJSONData(
-      const content::URLFetcher* source,
-      const GURL& url,
-      DictionaryValue* json_data,
-      bool succeeded);
+  // CloudPrintAuth::Client implementation.
+  virtual void OnAuthenticationComplete(
+      const std::string& access_token,
+      const std::string& robot_oauth_refresh_token,
+      const std::string& robot_email,
+      const std::string& user_email);
+  virtual void OnInvalidCredentials();
 
-  virtual void OnRequestAuthError();
-
-  // cloud_print::PrintServerWatcherDelegate implementation
-  virtual void OnPrinterAdded();
-  // PrinterJobHandler::Delegate implementation
-  virtual void OnPrinterJobHandlerShutdown(PrinterJobHandler* job_handler,
-                                   const std::string& printer_id);
-  virtual void OnAuthError();
-  virtual void OnPrinterNotFound(const std::string& printer_name,
-                                 bool* delete_from_server);
+  // CloudPrintConnector::Client implementation.
+  virtual void OnPrintersAvailable(const printing::PrinterList& printers);
+  virtual void OnAuthFailed();
 
   // notifier::TalkMediator::Delegate implementation.
   virtual void OnNotificationStateChange(
       bool notifications_enabled);
   virtual void OnIncomingNotification(
       const notifier::Notification& notification);
   virtual void OnOutgoingNotification();
 
-  // gaia::GaiaOAuthClient::Delegate implementation.
-  virtual void OnGetTokensResponse(const std::string& refresh_token,
-                                   const std::string& access_token,
-                                   int expires_in_seconds);
-  virtual void OnRefreshTokenResponse(const std::string& access_token,
-                                      int expires_in_seconds);
-  virtual void OnOAuthError();
-  virtual void OnNetworkError(int response_code);
-
  private:
-  // Prototype for a response handler.
-  typedef CloudPrintURLFetcher::ResponseAction
-      (CloudPrintProxyBackend::Core::*ResponseHandler)(
-          const content::URLFetcher* source,
-          const GURL& url,
-          DictionaryValue* json_data,
-          bool succeeded);
-  // Begin response handlers
-  CloudPrintURLFetcher::ResponseAction HandlePrinterListResponse(
-      const content::URLFetcher* source,
-      const GURL& url,
-      DictionaryValue* json_data,
-      bool succeeded);
-
-  CloudPrintURLFetcher::ResponseAction HandleRegisterPrinterResponse(
-      const content::URLFetcher* source,
-      const GURL& url,
-      DictionaryValue* json_data,
-      bool succeeded);
-
-  CloudPrintURLFetcher::ResponseAction HandleRegisterFailedStatusResponse(
-      const content::URLFetcher* source,
-      const GURL& url,
-      DictionaryValue* json_data,
-      bool succeeded);
-
-  CloudPrintURLFetcher::ResponseAction HandlePrintSystemUnavailableResponse(
-      const content::URLFetcher* source,
-      const GURL& url,
-      DictionaryValue* json_data,
-      bool succeeded);
-
-  CloudPrintURLFetcher::ResponseAction HandleEnumPrintersFailedResponse(
-      const content::URLFetcher* source,
-      const GURL& url,
-      DictionaryValue* json_data,
-      bool succeeded);
-
-  CloudPrintURLFetcher::ResponseAction HandleGetAuthCodeResponse(
-      const content::URLFetcher* source,
-      const GURL& url,
-      DictionaryValue* json_data,
-      bool succeeded);
-
-  // End response handlers
-
   // NotifyXXX is how the Core communicates with the frontend across
   // threads.
   void NotifyPrinterListAvailable(
       const printing::PrinterList& printer_list);
   void NotifyAuthenticated(
     const std::string& robot_oauth_refresh_token,
     const std::string& robot_email,
     const std::string& user_email);
   void NotifyAuthenticationFailed();
   void NotifyPrintSystemUnavailable();
 
-  // Once we have robot credentials, this method gets the ball rolling.
-  void PostAuthInitialization();
-  // Starts a new printer registration process.
-  void StartRegistration();
-  // Ends the printer registration process.
-  void EndRegistration();
-  // Registers printer capabilities and defaults for the next printer in the
-  // list with the cloud print server.
-  void RegisterNextPrinter();
-  // Retrieves the list of registered printers for this user/proxy combination
-  // from the cloud print server.
-  void GetRegisteredPrinters();
-  // Removes the given printer from the list. Returns false if the printer
-  // did not exist in the list.
-  bool RemovePrinterFromList(const std::string& printer_name);
-  // Initializes a job handler object for the specified printer. The job
-  // handler is responsible for checking for pending print jobs for this
-  // printer and print them.
-  void InitJobHandlerForPrinter(DictionaryValue* printer_data);
-  // Reports a diagnostic message to the server.
-  void ReportUserMessage(const std::string& message_id,
-                         const std::string& failure_message,
-                         ResponseHandler handler);
-  // Make a GAIA request to refresh the access token.
-  void RefreshAccessToken();
-
-  // Callback method for GetPrinterCapsAndDefaults.
-  void OnReceivePrinterCaps(
-      bool succeeded,
-      const std::string& printer_name,
-      const printing::PrinterCapsAndDefaults& caps_and_defaults);
+  // Init XMPP channel
+  void InitNotifications(const std::string& robot_email,
+                         const std::string& access_token);
 
   void HandlePrinterNotification(const std::string& printer_id);
   void PollForJobs();
   // Schedules a task to poll for jobs. Does nothing if a task is already
   // scheduled.
   void ScheduleJobPoll();
   CloudPrintTokenStore* GetTokenStore();
 
   // Our parent CloudPrintProxyBackend
   CloudPrintProxyBackend* backend_;
 
+  // Cloud Print authenticator.
+  scoped_refptr<CloudPrintAuth> auth_;
+
+  // Cloud Print connector.
+  scoped_refptr<CloudPrintConnector> connector_;
+
+  // Server URL.
   GURL cloud_print_server_url_;
-  gaia::OAuthClientInfo oauth_client_info_;
-  scoped_ptr<DictionaryValue> print_system_settings_;
-  // Pointer to current print system.
-  scoped_refptr<cloud_print::PrintSystem> print_system_;
-  // The list of printers to be registered with the cloud print server.
-  // To begin with,this list is initialized with the list of local and network
-  // printers available. Then we query the server for the list of printers
-  // already registered. We trim this list to remove the printers already
-  // registered. We then pass a copy of this list to the frontend to give the
-  // user a chance to further trim the list. When the frontend gives us the
-  // final list we make a copy into this so that we can start registering.
-  printing::PrinterList printer_list_;
-  // Indicates whether the printers in printer_list_ is the complete set of
-  // printers to be registered for this proxy.
-  bool complete_list_available_;
-  // The CloudPrintURLFetcher instance for the current request.
-  scoped_refptr<CloudPrintURLFetcher> request_;
-  // The index of the nex printer to be uploaded.
-  size_t next_upload_index_;
-  // The unique id for this proxy
+  // Proxy Id.
   std::string proxy_id_;
-  // The OAuth2 refresh token for the robot.
-  std::string refresh_token_;
-  // The email address of the user. This is only used during initial
-  // authentication with an LSID. This is only used for storing in prefs for
-  // display purposes.
-  std::string user_email_;
-  // The email address of the robot account.
-  std::string robot_email_;
-  // Cached info about the last printer that we tried to upload. We cache this
-  // so we won't have to requery the printer if the upload fails and we need
-  // to retry.
-  std::string last_uploaded_printer_name_;
-  printing::PrinterCapsAndDefaults last_uploaded_printer_info_;
-  // A map of printer id to job handler.
-  typedef std::map<std::string, scoped_refptr<PrinterJobHandler> >
-      JobHandlerMap;
-  JobHandlerMap job_handler_map_;
-  ResponseHandler next_response_handler_;
-  scoped_refptr<cloud_print::PrintSystem::PrintServerWatcher>
-      print_server_watcher_;
-  bool new_printers_available_;
-  bool registration_in_progress_;
   // Notification (xmpp) handler.
   scoped_ptr<notifier::TalkMediator> talk_mediator_;
   // Indicates whether XMPP notifications are currently enabled.
   bool notifications_enabled_;
   // The time when notifications were enabled. Valid only when
   // notifications_enabled_ is true.
   base::TimeTicks notifications_enabled_since_;
   // Indicates whether a task to poll for jobs has been scheduled.
   bool job_poll_scheduled_;
   // Indicates whether we should poll for jobs when we lose XMPP connection.
   bool enable_job_poll_;
-  scoped_ptr<gaia::GaiaOAuthClient> oauth_client_;
   scoped_ptr<CloudPrintTokenStore> token_store_;
 
   DISALLOW_COPY_AND_ASSIGN(Core);
 };
 
 CloudPrintProxyBackend::CloudPrintProxyBackend(
     CloudPrintProxyFrontend* frontend,
+    const std::string& proxy_id,
     const GURL& cloud_print_server_url,
     const DictionaryValue* print_system_settings,
     const gaia::OAuthClientInfo& oauth_client_info,
     bool enable_job_poll)
       : core_thread_("Chrome_CloudPrintProxyCoreThread"),
         frontend_loop_(MessageLoop::current()),
         frontend_(frontend) {
   DCHECK(frontend_);
   core_ = new Core(this,
+                   proxy_id,
                    cloud_print_server_url,
                    print_system_settings,
                    oauth_client_info,
                    enable_job_poll);
 }
 
 CloudPrintProxyBackend::~CloudPrintProxyBackend() {
   DCHECK(!core_);
 }
 
@@ skipping 73 matching lines @@
     const printing::PrinterList& printer_list) {
   core_thread_.message_loop()->PostTask(FROM_HERE,
       NewRunnableMethod(
           core_.get(),
           &CloudPrintProxyBackend::Core::DoRegisterSelectedPrinters,
           printer_list));
 }
 
 CloudPrintProxyBackend::Core::Core(
     CloudPrintProxyBackend* backend,
+    const std::string& proxy_id,
     const GURL& cloud_print_server_url,
     const DictionaryValue* print_system_settings,
     const gaia::OAuthClientInfo& oauth_client_info,
     bool enable_job_poll)
       : backend_(backend),
         cloud_print_server_url_(cloud_print_server_url),
-        oauth_client_info_(oauth_client_info),
-        complete_list_available_(false),
-        next_upload_index_(0),
-        next_response_handler_(NULL),
-        new_printers_available_(false),
-        registration_in_progress_(false),
-        notifications_enabled_(false),
+        proxy_id_(proxy_id),
         job_poll_scheduled_(false),
         enable_job_poll_(enable_job_poll) {
-  if (print_system_settings) {
-    // It is possible to have no print settings specified.
-    print_system_settings_.reset(print_system_settings->DeepCopy());
-  }
+  auth_ = new CloudPrintAuth(this,
+                             cloud_print_server_url,
+                             print_system_settings,
+                             oauth_client_info,
+                             proxy_id);
+  connector_ = new CloudPrintConnector(this,
+                                       proxy_id,
+                                       cloud_print_server_url,
+                                       print_system_settings);
 }
 
 void CloudPrintProxyBackend::Core::DoInitializeWithLsid(
     const std::string& lsid,
     const std::string& proxy_id,
     const std::string& last_robot_refresh_token,
     const std::string& last_robot_email,
     const std::string& last_user_email) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
   // Note: The GAIA login is synchronous but that should be OK because we are in
   // the CloudPrintProxyCoreThread and we cannot really do anything else until
   // the GAIA signin is successful.
-  std::string user_agent = "ChromiumBrowser";
-  scoped_refptr<ServiceGaiaAuthenticator> gaia_auth_for_print(
-      new ServiceGaiaAuthenticator(
-          user_agent, kCloudPrintGaiaServiceId,
-          GaiaUrls::GetInstance()->client_login_url(),
-          g_service_process->io_thread()->message_loop_proxy()));
-  gaia_auth_for_print->set_message_loop(MessageLoop::current());
-  if (gaia_auth_for_print->AuthenticateWithLsid(lsid)) {
-    // Stash away the user email so we can save it in prefs.
-    user_email_ = gaia_auth_for_print->email();
-    // If the same user is re-enabling Cloud Print and we have stashed robot
-    // credentials, we will use those.
-    if ((0 == base::strcasecmp(user_email_.c_str(), last_user_email.c_str())) &&
-        !last_robot_refresh_token.empty() &&
-        !last_robot_email.empty()) {
-      DoInitializeWithRobotToken(last_robot_refresh_token,
-                                 last_robot_email,
-                                 proxy_id);
-    }
-    DoInitializeWithToken(gaia_auth_for_print->auth_token(),
-                          proxy_id);
-  } else {
-    // Let the frontend know the of authentication failure.
-    OnAuthError();
-  }
+  auth_->AuthenticateWithLsid(lsid, last_robot_refresh_token,
+                              last_robot_email, last_user_email);
 }
 
 void CloudPrintProxyBackend::Core::DoInitializeWithToken(
     const std::string cloud_print_token,
     const std::string& proxy_id) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  VLOG(1) << "CP_PROXY: Starting proxy, id: " << proxy_id;
-  proxy_id_ = proxy_id;
-  GetTokenStore()->SetToken(cloud_print_token, false);
-
-  // We need to get the credentials of the robot here.
-  GURL get_authcode_url =
-      CloudPrintHelpers::GetUrlForGetAuthCode(cloud_print_server_url_,
-                                              oauth_client_info_.client_id,
-                                              proxy_id_);
-  next_response_handler_ =
-      &CloudPrintProxyBackend::Core::HandleGetAuthCodeResponse;
-  request_ = new CloudPrintURLFetcher;
-  request_->StartGetRequest(get_authcode_url,
-                            this,
-                            kCloudPrintAPIMaxRetryCount,
-                            std::string());
+  auth_->AuthenticateWithToken(cloud_print_token);
 }
 
 void CloudPrintProxyBackend::Core::DoInitializeWithRobotToken(
     const std::string& robot_oauth_refresh_token,
     const std::string& robot_email,
     const std::string& proxy_id) {
-  robot_email_ = robot_email;
-  proxy_id_ = proxy_id;
-  refresh_token_ = robot_oauth_refresh_token;
-  RefreshAccessToken();
+  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
+  auth_->AuthenticateWithRobotToken(robot_oauth_refresh_token, robot_email);
 }
 
 void CloudPrintProxyBackend::Core::DoInitializeWithRobotAuthCode(
     const std::string& robot_oauth_auth_code,
     const std::string& robot_email,
     const std::string& proxy_id) {
-  robot_email_ = robot_email;
-  proxy_id_ = proxy_id;
-  // Now that we have an auth code we need to get the refresh and access tokens.
-  oauth_client_.reset(new gaia::GaiaOAuthClient(
-      gaia::kGaiaOAuth2Url,
-      g_service_process->GetServiceURLRequestContextGetter()));
-  oauth_client_->GetTokensFromAuthCode(oauth_client_info_,
-                                       robot_oauth_auth_code,
-                                       kCloudPrintAPIMaxRetryCount,
-                                       this);
+  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
+  auth_->AuthenticateWithRobotAuthCode(robot_oauth_auth_code, robot_email);
 }
 
-void CloudPrintProxyBackend::Core::PostAuthInitialization() {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  // Now we can get down to registering printers.
-  print_system_ =
-      cloud_print::PrintSystem::CreateInstance(print_system_settings_.get());
-  if (!print_system_.get()) {
-    NOTREACHED();
-    return;  // No print system available, fail initalization.
+void CloudPrintProxyBackend::Core::OnAuthenticationComplete(
+    const std::string& access_token,
+    const std::string& robot_oauth_refresh_token,
+    const std::string& robot_email,
+    const std::string& user_email) {
+  CloudPrintTokenStore* token_store = GetTokenStore();
+  bool first_time = token_store->token().empty();
+  token_store->SetToken(access_token);
+  // Let the frontend know that we have authenticated.
+  backend_->frontend_loop_->PostTask(
+      FROM_HERE, NewRunnableMethod(this,
+                                   &Core::NotifyAuthenticated,
+                                   robot_oauth_refresh_token,
+                                   robot_email,
+                                   user_email));
+  if (first_time) {
+    InitNotifications(robot_email, access_token);
+  } else {
+    // If we are refreshing a token, update the XMPP token too.
+    DCHECK(talk_mediator_.get());
+    talk_mediator_->SetAuthToken(robot_email,
+                                 access_token,
+                                 kSyncGaiaServiceId);
   }
-  cloud_print::PrintSystem::PrintSystemResult result = print_system_->Init();
-
-  if (result.succeeded()) {
-    notifier::NotifierOptions notifier_options;
-    notifier_options.request_context_getter =
-        g_service_process->GetServiceURLRequestContextGetter();
-    notifier_options.auth_mechanism = "X-OAUTH2";
-    talk_mediator_.reset(new notifier::TalkMediatorImpl(
-        new notifier::MediatorThreadImpl(notifier_options),
-        notifier_options));
-    notifier::Subscription subscription;
-    subscription.channel = kCloudPrintPushNotificationsSource;
-    subscription.from = kCloudPrintPushNotificationsSource;
-    talk_mediator_->AddSubscription(subscription);
-    talk_mediator_->SetDelegate(this);
-    talk_mediator_->SetAuthToken(
-        robot_email_,
-        CloudPrintTokenStore::current()->token(),
-        kSyncGaiaServiceId);
-    talk_mediator_->Login();
-
-    print_server_watcher_ = print_system_->CreatePrintServerWatcher();
-    print_server_watcher_->StartWatching(this);
-
-    StartRegistration();
-  } else {
-    // We could not initialize the print system. We need to notify the server.
-    ReportUserMessage(
-        kPrintSystemFailedMessageId,
-        result.message(),
-        &CloudPrintProxyBackend::Core::HandlePrintSystemUnavailableResponse);
+  // Start cloud print connector if needed.
+  if (!connector_->IsRunning()) {
+    if (!connector_->Start()) {
+      // Let the frontend know that we do not have a print system.
+      backend_->frontend_loop_->PostTask(
+          FROM_HERE,
+          NewRunnableMethod(this,
+                            &Core::NotifyPrintSystemUnavailable));
+    }
   }
 }
 
-void CloudPrintProxyBackend::Core::StartRegistration() {
+void CloudPrintProxyBackend::Core::OnInvalidCredentials() {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  printer_list_.clear();
-  cloud_print::PrintSystem::PrintSystemResult result =
-      print_system_->EnumeratePrinters(&printer_list_);
-  complete_list_available_ = result.succeeded();
-  registration_in_progress_ = true;
-  if (!result.succeeded()) {
-    std::string message = result.message();
-    if (message.empty())
-      message = l10n_util::GetStringUTF8(IDS_CLOUD_PRINT_ENUM_FAILED);
-    // There was a failure enumerating printers. Send a message to the server.
-    ReportUserMessage(
-        kEnumPrintersFailedMessageId,
-        message,
-        &CloudPrintProxyBackend::Core::HandleEnumPrintersFailedResponse);
-  } else {
-    // Now we need to ask the server about printers that were registered on the
-    // server so that we can trim this list.
-    GetRegisteredPrinters();
-  }
+  VLOG(1) << "CP_CONNECTOR: Auth Error";
+  backend_->frontend_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
+      &Core::NotifyAuthenticationFailed));
 }
 
-void CloudPrintProxyBackend::Core::EndRegistration() {
+void CloudPrintProxyBackend::Core::OnPrintersAvailable(
+    const printing::PrinterList& printers) {
+  // Let the frontend know that we have a list of printers available.
+  backend_->frontend_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
+      &Core::NotifyPrinterListAvailable, printers));
+}
+
+void CloudPrintProxyBackend::Core::OnAuthFailed() {
+  VLOG(1) << "CP_CONNECTOR: Authentication failed in connector.";
+  // Let's stop connecter and refresh token. We'll restart connecter once
+  // new token available.
+  if (connector_->IsRunning())
+    connector_->Stop();
+
+  // Refresh Auth token.
+  auth_->RefreshAccessToken();
+}
+
+void CloudPrintProxyBackend::Core::InitNotifications(
+    const std::string& robot_email,
+    const std::string& access_token) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  request_ = NULL;
-  registration_in_progress_ = false;
-  if (new_printers_available_) {
-    new_printers_available_ = false;
-    StartRegistration();
-  }
+
+  notifier::NotifierOptions notifier_options;
+  notifier_options.request_context_getter =
+      g_service_process->GetServiceURLRequestContextGetter();
+  notifier_options.auth_mechanism = "X-OAUTH2";
+  talk_mediator_.reset(new notifier::TalkMediatorImpl(
+      new notifier::MediatorThreadImpl(notifier_options),
+      notifier_options));
+  notifier::Subscription subscription;
+  subscription.channel = kCloudPrintPushNotificationsSource;
+  subscription.from = kCloudPrintPushNotificationsSource;
+  talk_mediator_->AddSubscription(subscription);
+  talk_mediator_->SetDelegate(this);
+  talk_mediator_->SetAuthToken(robot_email, access_token, kSyncGaiaServiceId);
+  talk_mediator_->Login();
 }
 
 void CloudPrintProxyBackend::Core::DoShutdown() {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  VLOG(1) << "CP_PROXY: Shutdown proxy, id: " << proxy_id_;
-  if (print_server_watcher_ != NULL)
-    print_server_watcher_->StopWatching();
+  VLOG(1) << "CP_CONNECTOR: Shutdown connector, id: " << proxy_id_;
 
-  // Need to kill all running jobs.
-  while (!job_handler_map_.empty()) {
-    JobHandlerMap::iterator index = job_handler_map_.begin();
-    // Shutdown will call our OnPrinterJobHandlerShutdown method which will
-    // remove this from the map.
-    index->second->Shutdown();
-  }
+  if (connector_->IsRunning())
+    connector_->Stop();
+
   // Important to delete the TalkMediator on this thread.
   if (talk_mediator_.get())
     talk_mediator_->Logout();
   talk_mediator_.reset();
   notifications_enabled_ = false;
   notifications_enabled_since_ = base::TimeTicks();
-  request_ = NULL;
   token_store_.reset();
 }
 
 void CloudPrintProxyBackend::Core::DoRegisterSelectedPrinters(
     const printing::PrinterList& printer_list) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  if (!print_system_.get())
-    return;  // No print system available.
-  printer_list_.assign(printer_list.begin(), printer_list.end());
-  next_upload_index_ = 0;
-  RegisterNextPrinter();
-}
-
-void CloudPrintProxyBackend::Core::GetRegisteredPrinters() {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  GURL printer_list_url =
-      CloudPrintHelpers::GetUrlForPrinterList(cloud_print_server_url_,
-                                              proxy_id_);
-  next_response_handler_ =
-      &CloudPrintProxyBackend::Core::HandlePrinterListResponse;
-  request_ = new CloudPrintURLFetcher;
-  request_->StartGetRequest(printer_list_url,
-                            this,
-                            kCloudPrintAPIMaxRetryCount,
-                            std::string());
-}
-
-void CloudPrintProxyBackend::Core::RegisterNextPrinter() {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  // For the next printer to be uploaded, create a multi-part post request to
-  // upload the printer capabilities and the printer defaults.
-  if (next_upload_index_ < printer_list_.size()) {
-    const printing::PrinterBasicInfo& info =
-        printer_list_.at(next_upload_index_);
-    // If we are retrying a previous upload, we don't need to fetch the caps
-    // and defaults again.
-    if (info.printer_name != last_uploaded_printer_name_) {
-      cloud_print::PrintSystem::PrinterCapsAndDefaultsCallback* callback =
-           NewCallback(this,
-                       &CloudPrintProxyBackend::Core::OnReceivePrinterCaps);
-        // Asnchronously fetch the printer caps and defaults. The story will
-        // continue in OnReceivePrinterCaps.
-        print_system_->GetPrinterCapsAndDefaults(
-            info.printer_name.c_str(), callback);
-    } else {
-      OnReceivePrinterCaps(true,
-                           last_uploaded_printer_name_,
-                           last_uploaded_printer_info_);
-    }
-  } else {
-    EndRegistration();
-  }
-}
-
-void CloudPrintProxyBackend::Core::OnReceivePrinterCaps(
-    bool succeeded,
-    const std::string& printer_name,
-    const printing::PrinterCapsAndDefaults& caps_and_defaults) {
-  DCHECK(next_upload_index_ < printer_list_.size());
-  if (succeeded) {
-    const printing::PrinterBasicInfo& info =
-        printer_list_.at(next_upload_index_);
-
-    last_uploaded_printer_name_ = info.printer_name;
-    last_uploaded_printer_info_ = caps_and_defaults;
-
-    std::string mime_boundary;
-    CloudPrintHelpers::CreateMimeBoundaryForUpload(&mime_boundary);
-    std::string post_data;
-
-    CloudPrintHelpers::AddMultipartValueForUpload(kProxyIdValue, proxy_id_,
-                                                  mime_boundary,
-                                                  std::string(), &post_data);
-    CloudPrintHelpers::AddMultipartValueForUpload(kPrinterNameValue,
-                                                  info.printer_name,
-                                                  mime_boundary,
-                                                  std::string(), &post_data);
-    CloudPrintHelpers::AddMultipartValueForUpload(kPrinterDescValue,
-                                                  info.printer_description,
-                                                  mime_boundary,
-                                                  std::string() , &post_data);
-    CloudPrintHelpers::AddMultipartValueForUpload(
-        kPrinterStatusValue, base::StringPrintf("%d", info.printer_status),
-        mime_boundary, std::string(), &post_data);
-    // Add printer options as tags.
-    CloudPrintHelpers::GenerateMultipartPostDataForPrinterTags(info.options,
-                                                               mime_boundary,
-                                                               &post_data);
-
-    CloudPrintHelpers::AddMultipartValueForUpload(
-        kPrinterCapsValue, last_uploaded_printer_info_.printer_capabilities,
-        mime_boundary, last_uploaded_printer_info_.caps_mime_type,
-        &post_data);
-    CloudPrintHelpers::AddMultipartValueForUpload(
-        kPrinterDefaultsValue, last_uploaded_printer_info_.printer_defaults,
-        mime_boundary, last_uploaded_printer_info_.defaults_mime_type,
-        &post_data);
-    // Send a hash of the printer capabilities to the server. We will use this
-    // later to check if the capabilities have changed
-    CloudPrintHelpers::AddMultipartValueForUpload(
-        kPrinterCapsHashValue,
-        base::MD5String(last_uploaded_printer_info_.printer_capabilities),
-        mime_boundary, std::string(), &post_data);
-    GURL post_url = CloudPrintHelpers::GetUrlForPrinterRegistration(
-        cloud_print_server_url_);
-
-    next_response_handler_ =
-        &CloudPrintProxyBackend::Core::HandleRegisterPrinterResponse;
-    // Terminate the request body
-    post_data.append("--" + mime_boundary + "--\r\n");
-    std::string mime_type("multipart/form-data; boundary=");
-    mime_type += mime_boundary;
-    request_ = new CloudPrintURLFetcher;
-    request_->StartPostRequest(post_url,
-                               this,
-                               kCloudPrintAPIMaxRetryCount,
-                               mime_type,
-                               post_data,
-                               std::string());
-  } else {
-    LOG(ERROR) << "CP_PROXY: Failed to get printer info for: " <<
-        printer_name;
-    // This printer failed to register, notify the server of this failure.
-    string16 printer_name_utf16 = UTF8ToUTF16(printer_name);
-    std::string status_message = l10n_util::GetStringFUTF8(
-        IDS_CLOUD_PRINT_REGISTER_PRINTER_FAILED,
-        printer_name_utf16);
-    ReportUserMessage(
-        kGetPrinterCapsFailedMessageId,
-        status_message,
-        &CloudPrintProxyBackend::Core::HandleRegisterFailedStatusResponse);
-  }
+  connector_->RegisterPrinters(printer_list);
 }
 
 void CloudPrintProxyBackend::Core::HandlePrinterNotification(
     const std::string& printer_id) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  VLOG(1) << "CP_PROXY: Handle printer notification, id: " << printer_id;
-  JobHandlerMap::iterator index = job_handler_map_.find(printer_id);
-  if (index != job_handler_map_.end())
-    index->second->CheckForJobs(kJobFetchReasonNotified);
+  VLOG(1) << "CP_CONNECTOR: Handle printer notification, id: " << printer_id;
+  connector_->CheckForJobs(kJobFetchReasonNotified, printer_id);
 }
 
 void CloudPrintProxyBackend::Core::PollForJobs() {
-  VLOG(1) << "CP_PROXY: Polling for jobs.";
+  VLOG(1) << "CP_CONNECTOR: Polling for jobs.";
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  for (JobHandlerMap::iterator index = job_handler_map_.begin();
-       index != job_handler_map_.end(); index++) {
-    // If notifications are on, then we should poll for this printer only if
-    // the last time it fetched jobs was before notifications were last enabled.
-    bool should_poll =
-        !notifications_enabled_ ||
-        (index->second->last_job_fetch_time() <= notifications_enabled_since_);
-    if (should_poll)
-      index->second->CheckForJobs(kJobFetchReasonPoll);
-  }
+  // Check all printers for jobs.
+  connector_->CheckForJobs(kJobFetchReasonPoll, std::string());
+
   job_poll_scheduled_ = false;
   // If we don't have notifications and job polling is enabled, poll again
   // after a while.
   if (!notifications_enabled_ && enable_job_poll_)
     ScheduleJobPoll();
 }
 
 void CloudPrintProxyBackend::Core::ScheduleJobPoll() {
   if (!job_poll_scheduled_) {
     int interval_in_seconds = base::RandInt(kMinJobPollIntervalSecs,
                                             kMaxJobPollIntervalSecs);
     MessageLoop::current()->PostDelayedTask(
         FROM_HERE,
         NewRunnableMethod(this, &CloudPrintProxyBackend::Core::PollForJobs),
         interval_in_seconds * 1000);
     job_poll_scheduled_ = true;
   }
 }
 
 CloudPrintTokenStore* CloudPrintProxyBackend::Core::GetTokenStore() {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
   if (!token_store_.get())
     token_store_.reset(new CloudPrintTokenStore);
   return token_store_.get();
 }
 
-// CloudPrintURLFetcher::Delegate implementation.
-CloudPrintURLFetcher::ResponseAction
-CloudPrintProxyBackend::Core::HandleJSONData(
-    const content::URLFetcher* source,
-    const GURL& url,
-    DictionaryValue* json_data,
-    bool succeeded) {
-  DCHECK(next_response_handler_);
-  return (this->*next_response_handler_)(source, url, json_data, succeeded);
-}
-
-void CloudPrintProxyBackend::Core::OnRequestAuthError() {
-  OnAuthError();
-}
-
 void CloudPrintProxyBackend::Core::NotifyPrinterListAvailable(
     const printing::PrinterList& printer_list) {
   DCHECK(MessageLoop::current() == backend_->frontend_loop_);
   backend_->frontend_->OnPrinterListAvailable(printer_list);
 }
 
 void CloudPrintProxyBackend::Core::NotifyAuthenticated(
     const std::string& robot_oauth_refresh_token,
     const std::string& robot_email,
     const std::string& user_email) {
   DCHECK(MessageLoop::current() == backend_->frontend_loop_);
   backend_->frontend_->OnAuthenticated(robot_oauth_refresh_token,
                                        robot_email,
                                        user_email);
 }
 
 void CloudPrintProxyBackend::Core::NotifyAuthenticationFailed() {
   DCHECK(MessageLoop::current() == backend_->frontend_loop_);
   backend_->frontend_->OnAuthenticationFailed();
 }
 
 void CloudPrintProxyBackend::Core::NotifyPrintSystemUnavailable() {
   DCHECK(MessageLoop::current() == backend_->frontend_loop_);
   backend_->frontend_->OnPrintSystemUnavailable();
 }
 
-CloudPrintURLFetcher::ResponseAction
-CloudPrintProxyBackend::Core::HandleGetAuthCodeResponse(
-    const content::URLFetcher* source,
-    const GURL& url,
-    DictionaryValue* json_data,
-    bool succeeded) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  if (!succeeded) {
-    OnAuthError();
-    return CloudPrintURLFetcher::STOP_PROCESSING;
-  }
-  std::string auth_code;
-  if (!json_data->GetString(kOAuthCodeValue, &auth_code)) {
-    OnAuthError();
-    return CloudPrintURLFetcher::STOP_PROCESSING;
-  }
-  json_data->GetString(kXMPPJidValue, &robot_email_);
-  // Now that we have an auth code we need to get the refresh and access tokens.
-  oauth_client_.reset(new gaia::GaiaOAuthClient(
-      gaia::kGaiaOAuth2Url,
-      g_service_process->GetServiceURLRequestContextGetter()));
-  oauth_client_->GetTokensFromAuthCode(oauth_client_info_,
-                                       auth_code,
-                                       kCloudPrintAPIMaxRetryCount,
-                                       this);
-
-  return CloudPrintURLFetcher::STOP_PROCESSING;
-}
-
-CloudPrintURLFetcher::ResponseAction
-CloudPrintProxyBackend::Core::HandlePrinterListResponse(
-    const content::URLFetcher* source,
-    const GURL& url,
-    DictionaryValue* json_data,
-    bool succeeded) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  if (!succeeded) {
-    NOTREACHED();
-    return CloudPrintURLFetcher::RETRY_REQUEST;
-  }
-  ListValue* printer_list = NULL;
-  // There may be no "printers" value in the JSON
-  if (json_data->GetList(kPrinterListValue, &printer_list) && printer_list) {
-    for (size_t index = 0; index < printer_list->GetSize(); index++) {
-      DictionaryValue* printer_data = NULL;
-      if (printer_list->GetDictionary(index, &printer_data)) {
-        std::string printer_name;
-        printer_data->GetString(kNameValue, &printer_name);
-        RemovePrinterFromList(printer_name);
-        InitJobHandlerForPrinter(printer_data);
-      } else {
-        NOTREACHED();
-      }
-    }
-  }
-  request_ = NULL;
-  if (!printer_list_.empty()) {
-    // Let the frontend know that we have a list of printers available.
-    backend_->frontend_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
-        &Core::NotifyPrinterListAvailable, printer_list_));
-  } else {
-    // No more work to be done here.
-    MessageLoop::current()->PostTask(
-        FROM_HERE, NewRunnableMethod(this, &Core::EndRegistration));
-  }
-  return CloudPrintURLFetcher::STOP_PROCESSING;
-}
-
-void CloudPrintProxyBackend::Core::InitJobHandlerForPrinter(
-    DictionaryValue* printer_data) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  DCHECK(printer_data);
-  PrinterJobHandler::PrinterInfoFromCloud printer_info_cloud;
-  printer_data->GetString(kIdValue, &printer_info_cloud.printer_id);
-  DCHECK(!printer_info_cloud.printer_id.empty());
-  VLOG(1) << "CP_PROXY: Init job handler for printer id: "
-          << printer_info_cloud.printer_id;
-  JobHandlerMap::iterator index = job_handler_map_.find(
-      printer_info_cloud.printer_id);
-  // We might already have a job handler for this printer
-  if (index == job_handler_map_.end()) {
-    printing::PrinterBasicInfo printer_info;
-    printer_data->GetString(kNameValue, &printer_info.printer_name);
-    DCHECK(!printer_info.printer_name.empty());
-    printer_data->GetString(kPrinterDescValue,
-                            &printer_info.printer_description);
-    // Printer status is a string value which actually contains an integer.
-    std::string printer_status;
-    if (printer_data->GetString(kPrinterStatusValue, &printer_status)) {
-      base::StringToInt(printer_status, &printer_info.printer_status);
-    }
-    printer_data->GetString(kPrinterCapsHashValue,
-        &printer_info_cloud.caps_hash);
-    ListValue* tags_list = NULL;
-    if (printer_data->GetList(kTagsValue, &tags_list) && tags_list) {
-      for (size_t index = 0; index < tags_list->GetSize(); index++) {
-        std::string tag;
-        if (tags_list->GetString(index, &tag) &&
-            StartsWithASCII(tag, kTagsHashTagName, false)) {
-          std::vector<std::string> tag_parts;
-          base::SplitStringDontTrim(tag, '=', &tag_parts);
-          DCHECK_EQ(tag_parts.size(), 2U);
-          if (tag_parts.size() == 2)
-            printer_info_cloud.tags_hash = tag_parts[1];
-        }
-      }
-    }
-    scoped_refptr<PrinterJobHandler> job_handler;
-    job_handler = new PrinterJobHandler(printer_info,
-                                        printer_info_cloud,
-                                        cloud_print_server_url_,
-                                        print_system_.get(),
-                                        this);
-    job_handler_map_[printer_info_cloud.printer_id] = job_handler;
-    job_handler->Initialize();
-  }
-}
-
-void CloudPrintProxyBackend::Core::ReportUserMessage(
-    const std::string& message_id,
-    const std::string& failure_message,
-    ResponseHandler handler) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  std::string mime_boundary;
-  CloudPrintHelpers::CreateMimeBoundaryForUpload(&mime_boundary);
-  GURL post_url = CloudPrintHelpers::GetUrlForUserMessage(
-      cloud_print_server_url_,
-      message_id);
-  std::string post_data;
-  CloudPrintHelpers::AddMultipartValueForUpload(kMessageTextValue,
-                                                failure_message,
-                                                mime_boundary,
-                                                std::string(),
-                                                &post_data);
-  next_response_handler_ = handler;
-  // Terminate the request body
-  post_data.append("--" + mime_boundary + "--\r\n");
-  std::string mime_type("multipart/form-data; boundary=");
-  mime_type += mime_boundary;
-  request_ = new CloudPrintURLFetcher;
-  request_->StartPostRequest(post_url,
-                             this,
-                             kCloudPrintAPIMaxRetryCount,
-                             mime_type,
-                             post_data,
-                             std::string());
-}
-
-CloudPrintURLFetcher::ResponseAction
-CloudPrintProxyBackend::Core::HandleRegisterPrinterResponse(
-    const content::URLFetcher* source,
-    const GURL& url,
-    DictionaryValue* json_data,
-    bool succeeded) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  if (succeeded) {
-    ListValue* printer_list = NULL;
-    // There should be a "printers" value in the JSON
-    if (json_data->GetList(kPrinterListValue, &printer_list)) {
-      DictionaryValue* printer_data = NULL;
-      if (printer_list->GetDictionary(0, &printer_data))
-        InitJobHandlerForPrinter(printer_data);
-    }
-  }
-  next_upload_index_++;
-  MessageLoop::current()->PostTask(
-      FROM_HERE,
-      NewRunnableMethod(this,
-                        &CloudPrintProxyBackend::Core::RegisterNextPrinter));
-  return CloudPrintURLFetcher::STOP_PROCESSING;
-}
-
-CloudPrintURLFetcher::ResponseAction
-CloudPrintProxyBackend::Core::HandleRegisterFailedStatusResponse(
-    const content::URLFetcher* source,
-    const GURL& url,
-    DictionaryValue* json_data,
-    bool succeeded) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  next_upload_index_++;
-  MessageLoop::current()->PostTask(
-      FROM_HERE,
-      NewRunnableMethod(this,
-                        &CloudPrintProxyBackend::Core::RegisterNextPrinter));
-  return CloudPrintURLFetcher::STOP_PROCESSING;
-}
-
-CloudPrintURLFetcher::ResponseAction
-CloudPrintProxyBackend::Core::HandlePrintSystemUnavailableResponse(
-    const content::URLFetcher* source,
-    const GURL& url,
-    DictionaryValue* json_data,
-    bool succeeded) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  // Let the frontend know that we do not have a print system.
-  backend_->frontend_loop_->PostTask(
-      FROM_HERE,
-      NewRunnableMethod(this,
-                        &Core::NotifyPrintSystemUnavailable));
-  return CloudPrintURLFetcher::STOP_PROCESSING;
-}
-
-CloudPrintURLFetcher::ResponseAction
-CloudPrintProxyBackend::Core::HandleEnumPrintersFailedResponse(
-    const content::URLFetcher* source,
-    const GURL& url,
-    DictionaryValue* json_data,
-    bool succeeded) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  // Now proceed with printer registration.
-  GetRegisteredPrinters();
-  return CloudPrintURLFetcher::STOP_PROCESSING;
-}
-
-
-bool CloudPrintProxyBackend::Core::RemovePrinterFromList(
-    const std::string& printer_name) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  for (printing::PrinterList::iterator index = printer_list_.begin();
-       index != printer_list_.end(); index++) {
-    if (0 == base::strcasecmp(index->printer_name.c_str(),
-                              printer_name.c_str())) {
-      index = printer_list_.erase(index);
-      return true;
-    }
-  }
-  return false;
-}
-
-void CloudPrintProxyBackend::Core::RefreshAccessToken() {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  oauth_client_.reset(new gaia::GaiaOAuthClient(
-      gaia::kGaiaOAuth2Url,
-      g_service_process->GetServiceURLRequestContextGetter()));
-  oauth_client_->RefreshToken(oauth_client_info_,
-                              refresh_token_,
-                              kCloudPrintAPIMaxRetryCount,
-                              this);
-}
-
 void CloudPrintProxyBackend::Core::OnNotificationStateChange(
     bool notification_enabled) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
   notifications_enabled_ = notification_enabled;
   if (notifications_enabled_) {
     notifications_enabled_since_ = base::TimeTicks::Now();
-    VLOG(1) << "Notifications for proxy " << proxy_id_ << " were enabled at "
+    VLOG(1) << "Notifications for connector " << proxy_id_
+            << " were enabled at "
             << notifications_enabled_since_.ToInternalValue();
   } else {
-    LOG(ERROR) << "Notifications for proxy " << proxy_id_ << " disabled.";
+    LOG(ERROR) << "Notifications for connector " << proxy_id_ << " disabled.";
     notifications_enabled_since_ = base::TimeTicks();
   }
   // A state change means one of two cases.
   // Case 1: We just lost notifications. This this case we want to schedule a
   // job poll if enable_job_poll_ is true.
   // Case 2: Notifications just got re-enabled. In this case we want to schedule
   // a poll once for jobs we might have missed when we were dark.
   // Note that ScheduleJobPoll will not schedule again if a job poll task is
   // already scheduled.
   if (enable_job_poll_ || notifications_enabled_)
     ScheduleJobPoll();
 }
 
 
 void CloudPrintProxyBackend::Core::OnIncomingNotification(
     const notifier::Notification& notification) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  VLOG(1) << "CP_PROXY: Incoming notification.";
+  VLOG(1) << "CP_CONNECTOR: Incoming notification.";
   if (0 == base::strcasecmp(kCloudPrintPushNotificationsSource,
                             notification.channel.c_str()))
     HandlePrinterNotification(notification.data);
 }
 
 void CloudPrintProxyBackend::Core::OnOutgoingNotification() {}
-
-// cloud_print::PrinterChangeNotifier::Delegate implementation
-void CloudPrintProxyBackend::Core::OnPrinterAdded() {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  if (registration_in_progress_)
-    new_printers_available_ = true;
-  else
-    StartRegistration();
-}
-
-// PrinterJobHandler::Delegate implementation
-void CloudPrintProxyBackend::Core::OnPrinterJobHandlerShutdown(
-    PrinterJobHandler* job_handler, const std::string& printer_id) {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  VLOG(1) << "CP_PROXY: Printer job handle shutdown, id " << printer_id;
-  job_handler_map_.erase(printer_id);
-}
-
-void CloudPrintProxyBackend::Core::OnAuthError() {
-  DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  VLOG(1) << "CP_PROXY: Auth Error";
-  backend_->frontend_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
-      &Core::NotifyAuthenticationFailed));
-}
-
-void CloudPrintProxyBackend::Core::OnPrinterNotFound(
-    const std::string& printer_name,
-    bool* delete_from_server) {
-  // If we have a complete list of local printers, then this needs to be deleted
-  // from the server.
-  *delete_from_server = complete_list_available_;
-}
-
-  // gaia::GaiaOAuthClient::Delegate implementation.
-void CloudPrintProxyBackend::Core::OnGetTokensResponse(
-    const std::string& refresh_token,
-    const std::string& access_token,
-    int expires_in_seconds) {
-  refresh_token_ = refresh_token;
-  // After saving the refresh token, this is just like having just refreshed
-  // the access token. Just call OnRefreshTokenResponse.
-  OnRefreshTokenResponse(access_token, expires_in_seconds);
-}
-
-void CloudPrintProxyBackend::Core::OnRefreshTokenResponse(
-    const std::string& access_token, int expires_in_seconds) {
-  // If our current token is not OAuth, we either have no token at all or we
-  // have a ClientLogin token which we just exchanged for an OAuth token.
-  // In this case we need to do the startup initialiazation.
-  // TODO(sanjeevr): Use an enum for state instead of using this as a signal.
-  // I will do this in a follow-up change.
-  CloudPrintTokenStore* token_store = GetTokenStore();
-  bool first_time = !token_store->token_is_oauth();
-  token_store->SetToken(access_token, true);
-  // Let the frontend know that we have authenticated.
-  backend_->frontend_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
-      &Core::NotifyAuthenticated, refresh_token_, robot_email_, user_email_));
-  if (first_time) {
-    PostAuthInitialization();
-  } else {
-    // If we are refreshing a token, update the XMPP token too.
-    DCHECK(talk_mediator_.get());
-    talk_mediator_->SetAuthToken(robot_email_,
-                                 access_token,
-                                 kSyncGaiaServiceId);
-  }
-  // Schedule a task to refresh the access token again when it is about to
-  // expire.
-  DCHECK(expires_in_seconds > kTokenRefreshGracePeriodSecs);
-  int64 refresh_delay =
-      (expires_in_seconds - kTokenRefreshGracePeriodSecs)*1000;
-  MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      NewRunnableMethod(this, &Core::RefreshAccessToken),
-      refresh_delay);
-}
-
-void CloudPrintProxyBackend::Core::OnOAuthError() {
-  OnAuthError();
-}
-
-void CloudPrintProxyBackend::Core::OnNetworkError(int response_code) {
-  // Since we specify inifinite retries on network errors, this should never
-  // be called.
-  NOTREACHED() <<
-      "OnNetworkError invoked when not expected, response code is " <<
-      response_code;
-}