[BlobAsync] Disk support for blob storage

storage/browser/blob/shareable_blob_data_item.cc

Index: storage/browser/blob/shareable_blob_data_item.cc
diff --git a/storage/browser/blob/shareable_blob_data_item.cc b/storage/browser/blob/shareable_blob_data_item.cc
index 40aaf9c7e10d29d40acbc73798f67f6c16030b4d..beca3deb051d9699da2d795ef17bdc4e67f916d6 100644
--- a/storage/browser/blob/shareable_blob_data_item.cc
+++ b/storage/browser/blob/shareable_blob_data_item.cc
@@ -8,12 +8,10 @@
 
 namespace storage {
 
-ShareableBlobDataItem::ShareableBlobDataItem(
-    const std::string& blob_uuid,
-    const scoped_refptr<BlobDataItem>& item)
-    : item_(item) {
+ShareableBlobDataItem::ShareableBlobDataItem(uint64_t item_id,
+                                             scoped_refptr<BlobDataItem> item)
+    : item_id_(item_id), item_(std::move(item)) {
   DCHECK_NE(item_->type(), DataElement::TYPE_BLOB);
-  referencing_blobs_.insert(blob_uuid);
 }
 
 ShareableBlobDataItem::~ShareableBlobDataItem() {