Make base::Value::TYPE a scoped enum.

chrome/browser/extensions/api/settings_private/settings_private_api.cc

 // Copyright 2015 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/extensions/api/settings_private/settings_private_api.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
@@ skipping 81 matching lines @@
   std::unique_ptr<api::settings_private::GetPref::Params> parameters =
       api::settings_private::GetPref::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(parameters.get());
 
   SettingsPrivateDelegate* delegate =
       SettingsPrivateDelegateFactory::GetForBrowserContext(browser_context());
   if (delegate == nullptr)
     return RespondNow(Error(kDelegateIsNull));
 
   std::unique_ptr<base::Value> value = delegate->GetPref(parameters->name);
-  if (value->IsType(base::Value::TYPE_NULL))
+  if (value->IsType(base::Value::Type::NONE))
     return RespondNow(Error("Pref * does not exist", parameters->name));
   else
     return RespondNow(OneArgument(std::move(value)));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // SettingsPrivateGetDefaultZoomFunction
 ////////////////////////////////////////////////////////////////////////////////
 
 SettingsPrivateGetDefaultZoomFunction::
@@ skipping 29 matching lines @@
       SettingsPrivateDelegateFactory::GetForBrowserContext(browser_context());
   if (delegate == nullptr)
     return RespondNow(Error(kDelegateIsNull));
 
   delegate->SetDefaultZoom(parameters->zoom);
   return RespondNow(
       OneArgument(base::MakeUnique<base::FundamentalValue>(true)));
 }
 
 }  // namespace extensions