Make OffscreenCanvas Transferable

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

Index: third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h b/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
index 64b63e1a7a7cc54e3406c777c3114cdc6d25f991..15434cdd4588a12bea17373bd923b91b58f3ff7b 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
@@ -143,6 +143,7 @@ public:
     void writeTransferredMessagePort(uint32_t index);
     void writeTransferredArrayBuffer(uint32_t index);
     void writeTransferredImageBitmap(uint32_t index);
+    virtual void writeTransferredOffscreenCanvas(uint32_t index, uint32_t width, uint32_t height, uint32_t id) { };
     void writeTransferredSharedArrayBuffer(uint32_t index);
     void writeObjectReference(uint32_t reference);
     void writeObject(uint32_t numProperties);
@@ -210,7 +211,8 @@ public:
 
     enum TransferableType {
         TransferableArrayBufferType,
-        TransferableImageBitmapType
+        TransferableImageBitmapType,
+        TransferableOffscreenCanvasType
     };
 
     ScriptValueSerializer(SerializedScriptValueWriter&, MessagePortArray* messagePorts, TransferableArray*, WebBlobInfoArray*, BlobDataHandleMap& blobDataHandles, v8::TryCatch&, ScriptState*);
@@ -467,6 +469,7 @@ public:
     virtual bool tryGetTransferredMessagePort(uint32_t index, v8::Local<v8::Value>*) = 0;
     virtual bool tryGetTransferredArrayBuffer(uint32_t index, v8::Local<v8::Value>*) = 0;
     virtual bool tryGetTransferredImageBitmap(uint32_t index, v8::Local<v8::Value>*) = 0;
+    virtual bool tryGetTransferredOffscreenCanvas(uint32_t index, uint32_t width, uint32_t height, uint32_t id, v8::Local<v8::Value>*) { return true; };
     virtual bool tryGetTransferredSharedArrayBuffer(uint32_t index, v8::Local<v8::Value>*) = 0;
     virtual bool newSparseArray(uint32_t length) = 0;
     virtual bool newDenseArray(uint32_t length) = 0;