Fix crash in inspector-protocol/debugger/debugger-pause-dedicated-worker.html

Source/core/inspector/InspectorTaskRunner.h

+// 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.
+
+#ifndef InspectorTaskRunner_h
+#define InspectorTaskRunner_h
+
+#include "wtf/Forward.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+#include <v8.h>
+
+namespace blink {
+
+class InspectorTaskRunner final {
+    WTF_MAKE_NONCOPYABLE(InspectorTaskRunner);
+public:
+    explicit InspectorTaskRunner(v8::Isolate*);
+    ~InspectorTaskRunner();
+
+    class Task {
+    public:
+        virtual ~Task() { }
+        virtual void run() = 0;
+    };
+    // This method can be called on any thread. It is caller's responsibility to make sure that
+    // this V8Debugger and corresponding v8::Isolate exist while this method is running.
+    void interruptAndRun(PassOwnPtr<Task>);
+    void runPendingTasks();
+
+    void setIgnoreInterrupts(bool ignore) { m_ignoreInterrupts = ignore; }
+
+private:
+    static void v8InterruptCallback(v8::Isolate*, void* data);
+
+    v8::Isolate* m_isolate;
+    class ThreadSafeTaskQueue;
+    OwnPtr<ThreadSafeTaskQueue> m_taskQueue;
+    bool m_ignoreInterrupts;
+};
+
+} // namespace blink
+
+
+#endif // !defined(InspectorTaskRunner_h)