Make OffscreenCanvas Transferable

third_party/WebKit/Source/bindings/core/v8/TransferableExtractor.h

Index: third_party/WebKit/Source/bindings/core/v8/TransferableExtractor.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/TransferableExtractor.h b/third_party/WebKit/Source/bindings/core/v8/TransferableExtractor.h
new file mode 100644
index 0000000000000000000000000000000000000000..462e8baee6a87e11bf17751d1ed8581c9ee9c358
--- /dev/null
+++ b/third_party/WebKit/Source/bindings/core/v8/TransferableExtractor.h
@@ -0,0 +1,26 @@
+// 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 TransferableExtractor_h
+#define TransferableExtractor_h
+
+#include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/SerializedScriptValue.h"
+#include "core/CoreExport.h"
+#include "wtf/PassOwnPtr.h"
+#include <v8.h>
+
+namespace blink {
+
+class CORE_EXPORT TransferableExtractor {
+public:
+    virtual ~TransferableExtractor() { }
+    static void registerTransferableExtractor(PassOwnPtr<TransferableExtractor>);
+    static const Vector<OwnPtr<TransferableExtractor>>& getExtractors();
+    virtual bool extract(v8::Local<v8::Value>, v8::Isolate*, TransferableArray&, ExceptionState&, const unsigned) = 0;
+};
+
+} // namespace blink
+
+#endif // TransferableExtractor_h