[Sync] Rename SyncEnabledAndLoggedIn() to CanStartSync().

chrome/browser/sync/profile_sync_service.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 259 matching lines @@
   ~ProfileSyncService() override;
 
   // Initializes the object. This must be called at most once, and
   // immediately after an object of this class is constructed.
   void Initialize();
 
   // sync_driver::SyncService implementation
   bool HasSyncSetupCompleted() const override;
   bool IsSyncAllowed() const override;
   bool IsSyncActive() const override;
-  bool IsSyncEnabledAndLoggedIn() override;
+  bool CanSyncStart() const override;
   void DisableForUser() override;
   void RequestStop() override;
   void RequestStart() override;
   syncer::ModelTypeSet GetActiveDataTypes() const override;
   syncer::ModelTypeSet GetPreferredDataTypes() const override;
   void OnUserChoseDatatypes(bool sync_everything,
                             syncer::ModelTypeSet chosen_types) override;
   void SetSyncSetupCompleted() override;
   bool FirstSetupInProgress() const override;
   void SetSetupInProgress(bool setup_in_progress) override;
@@ skipping 807 matching lines @@
   base::WeakPtrFactory<ProfileSyncService> startup_controller_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 bool ShouldShowActionOnUI(
     const syncer::SyncProtocolError& error);
 
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_