[DO NOT SUBMIT] AudioWorklet FS1: importing scripts

third_party/WebKit/Source/modules/webaudio/WindowAudioWorklet.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/webaudio/WindowAudioWorklet.h"
+
+#include "core/frame/LocalDOMWindow.h"
+#include "core/frame/LocalFrame.h"
+#include "modules/webaudio/AudioWorklet.h"
+
+namespace blink {
+
+WindowAudioWorklet::WindowAudioWorklet(LocalDOMWindow& window)
+    : DOMWindowProperty(window.frame())
+{
+}
+
+const char* WindowAudioWorklet::supplementName()
+{
+    return "WindowAudioWorklet";
+}
+
+// static
+WindowAudioWorklet& WindowAudioWorklet::from(LocalDOMWindow& window)
+{
+    WindowAudioWorklet* supplement = static_cast<WindowAudioWorklet*>(Supplement<LocalDOMWindow>::from(window, supplementName()));
+    if (!supplement) {
+        supplement = new WindowAudioWorklet(window);
+        provideTo(window, supplementName(), supplement);
+    }
+    return *supplement;
+}
+
+// static
+// TODO: why this returns Worklet*? This seems to be the connection to the
+//       window name space.
+Worklet* WindowAudioWorklet::audioWorklet(ExecutionContext* executionContext, DOMWindow& window)
+{
+    return from(toLocalDOMWindow(window)).audioWorklet(executionContext);
+}
+
+AudioWorklet* WindowAudioWorklet::audioWorklet(ExecutionContext* executionContext) const
+{
+    if (!m_audioWorklet && frame())
+        m_audioWorklet = AudioWorklet::create(frame(), executionContext);
+    return m_audioWorklet.get();
+}
+
+DEFINE_TRACE(WindowAudioWorklet)
+{
+    visitor->trace(m_audioWorklet);
+    Supplement<LocalDOMWindow>::trace(visitor);
+    DOMWindowProperty::trace(visitor);
+}
+
+} // namespace blink