Basic framework for Budget API.

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

+// 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.
+
+#include "modules/budget/Budget.h"
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "bindings/core/v8/ScriptState.h"
+#include "core/dom/DOMException.h"
+#include "core/dom/ExceptionCode.h"
+#include "core/frame/Navigator.h"
+
+namespace blink {
+
+Budget::Budget(Navigator* navigator)
+    : m_navigator(navigator)
+{
+    DCHECK(navigator);
+}
+
+// static
+ScriptPromise Budget::getCost(ScriptState* state, const AtomicString& actionType)
+{
+    // TODO(harkness): Trigger the cost calculation.
+    return ScriptPromise::rejectWithDOMException(state, DOMException::create(NotSupportedError, "Not yet implemented"));
+}
+
+// static
+ScriptPromise Budget::getBudget(ScriptState* state, ExceptionState& exception)

[Peter Beverloo, 2016/08/03 13:25:54]

nit: drop the RaisesException annotation in the IDL file until we need it? We
can reject based on |state|, that doesn't need |exception|.

[harkness, 2016/08/04 14:18:23]

Done.

+{
+    // TODO(harkness): Trigger the budget calculation.
+    return ScriptPromise::rejectWithDOMException(state, DOMException::create(NotSupportedError, "Not yet implemented"));
+}
+
+DEFINE_TRACE(Budget)
+{
+    visitor->trace(m_navigator);
+}
+
+} // namespace blink