Use ENABLE_DISABLE_VALUE_TYPE for storage-manager switch and enable it by default on dev.

chrome/browser/ui/webui/options/browser_options_handler.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/ui/webui/options/browser_options_handler.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <utility>
@@ skipping 726 matching lines @@
       "enableExperimentalAccessibilityFeatures",
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           chromeos::switches::kEnableExperimentalAccessibilityFeatures));
 
   chromeos::CrosSettings* cros_settings = chromeos::CrosSettings::Get();
   bool allow_bluetooth = true;
   cros_settings->GetBoolean(chromeos::kAllowBluetooth, &allow_bluetooth);
   values->SetBoolean("allowBluetooth", allow_bluetooth);
 
   values->SetBoolean("enableStorageManager",
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          chromeos::switches::kEnableStorageManager));
+      !base::CommandLine::ForCurrentProcess()->HasSwitch(
+          chromeos::switches::kDisableStorageManager));
 #endif
 }
 
 #if defined(ENABLE_PRINT_PREVIEW)
 void BrowserOptionsHandler::RegisterCloudPrintValues(
     base::DictionaryValue* values) {
   values->SetString("cloudPrintOptionLabel",
                     l10n_util::GetStringFUTF16(
                         IDS_CLOUD_PRINT_CHROMEOS_OPTION_LABEL,
                         l10n_util::GetStringUTF16(IDS_GOOGLE_CLOUD_PRINT)));
@@ skipping 1433 matching lines @@
 
 bool BrowserOptionsHandler::IsDeviceOwnerProfile() {
 #if defined(OS_CHROMEOS)
   return chromeos::ProfileHelper::IsOwnerProfile(Profile::FromWebUI(web_ui()));
 #else
   return true;
 #endif
 }
 
 }  // namespace options