Added external memory counting for IDBValue

third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp

Index: third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
diff --git a/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp b/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
index f8239852e790f6811f2c33441c379fe578ae3cea..122e8f483060e4dc74f512b344219e87473ea384 100644
--- a/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
+++ b/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
@@ -394,9 +394,8 @@ static v8::Local<v8::Value> deserializeIDBValueData(v8::Isolate* isolate,
   if (!value || value->isNull())
     return v8::Null(isolate);
 
-  const SharedBuffer* valueData = value->data();
   RefPtr<SerializedScriptValue> serializedValue =
-      SerializedScriptValue::create(valueData->data(), valueData->size());
+      value->createSerializedValue();
   return serializedValue->deserialize(isolate, nullptr, value->blobInfo());
 }