Do nothing in EnableEncryptEverything()if encryption already enabled.

chrome/browser/sync/profile_sync_service.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/browser/sync/profile_sync_service.h"
 
 #include <algorithm>
 #include <cstddef>
 #include <map>
 #include <set>
@@ skipping 1308 matching lines @@
       cached_passphrases_.gaia_passphrase = passphrase;
     }
   }
 }
 
 void ProfileSyncService::EnableEncryptEverything() {
   // Tests override sync_initialized() to always return true, so we
   // must check that instead of |backend_initialized_|.
   // TODO(akalin): Fix the above. :/
   DCHECK(sync_initialized());
-  encryption_pending_ = true;
+  if (!encrypt_everything_)
+    encryption_pending_ = true;
 }
 
 bool ProfileSyncService::encryption_pending() const {
   // We may be called during the setup process before we're
   // initialized (via IsEncryptedDatatypeEnabled and
   // IsPassphraseRequiredForDecryption).
   return encryption_pending_;
 }
 
 bool ProfileSyncService::EncryptEverythingEnabled() const {
@@ skipping 203 matching lines @@
             << "Unrecoverable error.";
   } else {
     VLOG(0) << "ConfigureDataTypeManager not invoked because backend is not "
             << "initialized";
   }
 }
 
 const FailedDatatypesHandler& ProfileSyncService::failed_datatypes_handler() {
   return failed_datatypes_handler_;
 }