compositor-worker: Share a thread and an isolate for compositor workers.

Source/core/workers/WorkerV8Isolate.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 WorkerV8Isolate_h
+#define WorkerV8Isolate_h
+
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+#include <v8.h>
+
+namespace blink {
+
+class V8IsolateInterruptor;

[kinuko, 2015/05/26 14:41:25]

nit: Not referred in this file?

[sadrul, 2015/05/27 01:28:00]

Good catch. Removed.

+
+class WorkerV8Isolate {
+public:
+    static PassOwnPtr<WorkerV8Isolate> createDefault();
+    virtual ~WorkerV8Isolate() { }
+
+    virtual v8::Isolate* isolate() const = 0;
+    virtual void willDestroy() = 0;
+    virtual void terminateExecution() = 0;
+
+protected:
+    WorkerV8Isolate() { }
+};
+
+} // namespace blink
+
+#endif // WorkerV8Isolate_h