Support Blob on the V8-based structured clone path.

third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueSerializer.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 V8ScriptValueSerializer_h
 #define V8ScriptValueSerializer_h
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/SerializationTag.h"
@@ skipping 14 matching lines @@
 // Supports only basic JavaScript objects and core DOM types. Support for
 // modules types is implemented in a subclass.
 //
 // A serializer cannot be used multiple times; it is expected that its serialize
 // method will be invoked exactly once.
 class GC_PLUGIN_IGNORE("https://crbug.com/644725") CORE_EXPORT V8ScriptValueSerializer : public v8::ValueSerializer::Delegate {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(V8ScriptValueSerializer);
 public:
     explicit V8ScriptValueSerializer(RefPtr<ScriptState>);
+
+    // If not null, blobs will have info written into this array and be
+    // serialized by index.
+    void setBlobInfoArray(WebBlobInfoArray* blobInfoArray) { m_blobInfoArray = blobInfoArray; }
+
     RefPtr<SerializedScriptValue> serialize(v8::Local<v8::Value>, Transferables*, ExceptionState&);
 
 protected:
     // Returns true if the DOM object was successfully written.
     // If false is returned and no more specific exception is thrown, a generic
     // DataCloneError message will be used.
     virtual bool writeDOMObject(ScriptWrappable*, ExceptionState&);
 
     void writeTag(SerializationTag tag)
     {
@@ skipping 16 matching lines @@
 
     // v8::ValueSerializer::Delegate
     void ThrowDataCloneError(v8::Local<v8::String> message) override;
     v8::Maybe<bool> WriteHostObject(v8::Isolate*, v8::Local<v8::Object> message) override;
 
     RefPtr<ScriptState> m_scriptState;
     RefPtr<SerializedScriptValue> m_serializedScriptValue;
     v8::ValueSerializer m_serializer;
     const Transferables* m_transferables = nullptr;
     const ExceptionState* m_exceptionState = nullptr;
+    WebBlobInfoArray* m_blobInfoArray = nullptr;
+
 #if DCHECK_IS_ON()
     bool m_serializeInvoked = false;
 #endif
 };
 
 } // namespace blink
 
 #endif // V8ScriptValueSerializer_h