Support Blob on the V8-based structured clone path.

third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueDeserializer.h

Index: third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueDeserializer.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueDeserializer.h b/third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueDeserializer.h
index 17929171a72ddc6e65e3960ebd442ce9d660d013..25c09d3164e5c340649e0d2409e01c06b6e959e8 100644
--- a/third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueDeserializer.h
+++ b/third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueDeserializer.h
@@ -31,6 +31,7 @@ public:
     V8ScriptValueDeserializer(RefPtr<ScriptState>, RefPtr<SerializedScriptValue>);
 
     void setTransferredMessagePorts(const MessagePortArray* ports) { m_transferredMessagePorts = ports; }
+    void setBlobInfoArray(const WebBlobInfoArray* blobInfoArray) { m_blobInfoArray = blobInfoArray; }
 
     v8::Local<v8::Value> deserialize();
 
@@ -54,6 +55,8 @@ protected:
 private:
     void transfer();
 
+    RefPtr<BlobDataHandle> getOrCreateBlobDataHandle(const String& uuid, const String& type, uint64_t size);
+
     // v8::ValueDeserializer::Delegate
     v8::MaybeLocal<v8::Object> ReadHostObject(v8::Isolate*) override;
 
@@ -67,6 +70,9 @@ private:
     // ImageBitmaps which were transferred in.
     HeapVector<Member<ImageBitmap>> m_transferredImageBitmaps;
 
+    // Blob info for blobs stored by index.
+    const WebBlobInfoArray* m_blobInfoArray = nullptr;
+
     // Set during deserialize after the header is read.
     uint32_t m_version = 0;
 #if DCHECK_IS_ON()