[DO NOT SUBMIT] AudioWorklet FS1: importing scripts

third_party/WebKit/Source/modules/webaudio/AudioWorkletProcessorDefinition.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 AudioWorkletProcessorDefinition_h
+#define AudioWorkletProcessorDefinition_h
+
+#include "bindings/core/v8/ScopedPersistent.h"
+#include "platform/heap/Handle.h"
+#include <v8.h>
+
+namespace blink {
+
+class ScriptState;
+
+class AudioWorkletProcessorDefinition final : public GarbageCollectedFinalized<AudioWorkletProcessorDefinition> {
+public:
+    static AudioWorkletProcessorDefinition* create(ScriptState*, v8::Local<v8::Function> constructor, v8::Local<v8::Function> process);
+    virtual ~AudioWorkletProcessorDefinition();
+
+    // TODO: connect this to WebAudio render callback.
+    void process();
+
+    ScriptState* getScriptState() const { return m_scriptState.get(); }
+
+    v8::Local<v8::Function> processFunctionForTesting(v8::Isolate* isolate) { return m_process.newLocal(isolate); }
+
+    DEFINE_INLINE_TRACE() {};
+
+private:
+    AudioWorkletProcessorDefinition(ScriptState*, v8::Local<v8::Function> constructor, v8::Local<v8::Function> process);
+
+    void maybeCreateProcessInstance();
+
+    RefPtr<ScriptState> m_scriptState;
+
+    // This object keeps the class instance object, constructor function and
+    // process function alive. This object needs to be destroyed to break a
+    // reference cycle between it and the AudioWorkletGlobalScope.
+    ScopedPersistent<v8::Function> m_constructor;
+    ScopedPersistent<v8::Function> m_process;
+
+    bool m_didCallConstructor;
+};
+
+} // namespace blink
+
+#endif // AudioWorkletProcessorDefinition_h