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

chrome/browser/sync/profile_sync_service.cc

 // 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.
 
 #include "chrome/browser/sync/profile_sync_service.h"
 
 #include <cstddef>
 #include <map>
 #include <vector>
 
@@ skipping 271 matching lines @@
   device_info_sync_service_.reset(
       new DeviceInfoSyncService(local_device_.get()));
 }
 
 ProfileSyncService::~ProfileSyncService() {
   sync_prefs_.RemoveSyncPrefObserver(this);
   // Shutdown() should have been called before destruction.
   CHECK(!backend_initialized_);
 }
 
-bool ProfileSyncService::IsSyncEnabledAndLoggedIn() {
-  // Exit if sync is not allowed or not requested.
-  if (!IsSyncAllowed() || !IsSyncRequested())
-    return false;
-
-  return IsSignedIn();
+bool ProfileSyncService::CanSyncStart() const {
+  return IsSyncAllowed() && IsSyncRequested() && IsSignedIn();
 }
 
 bool ProfileSyncService::IsOAuthRefreshTokenAvailable() {
   if (!oauth2_token_service_)
     return false;
 
   return oauth2_token_service_->RefreshTokenIsAvailable(
       signin_->GetAccountIdToUse());
 }
 
@@ skipping 2441 matching lines @@
     } else {
       UMA_HISTOGRAM_COUNTS("Sync.MemoryPressureWarningBeforeCleanShutdown",
                            warning_received);
     }
   }
   sync_prefs_.SetMemoryPressureWarningCount(0);
   // Will set to true during a clean shutdown, so crash or something else will
   // remain this as false.
   sync_prefs_.SetCleanShutdown(false);
 }