Convert Budget to BudgetService.

third_party/WebKit/Source/modules/budget/Budget.h

-// Copyright 2016 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 Budget_h
-#define Budget_h
-
-#include "bindings/core/v8/ScriptWrappable.h"
-#include "modules/ModulesExport.h"
-
-namespace blink {
-
-class ScriptPromise;
-class ScriptState;
-
-// This is the entry point into the browser for the Budget API, which is
-// designed to give origins the ability to perform background operations
-// on the user's behalf.
-class Budget final : public GarbageCollected<Budget>, public ScriptWrappable {
-    DEFINE_WRAPPERTYPEINFO();
-
-public:
-    static Budget* create()
-    {
-        return new Budget();
-    }
-
-    ScriptPromise getCost(ScriptState*, const AtomicString& actionType);
-    ScriptPromise getBudget(ScriptState*);
-
-    DEFINE_INLINE_TRACE() {}
-
-private:
-    Budget();
-};
-
-} // namespace blink
-
-#endif // Budget_h