[Storage] Blob items are now shared between blobs. Ready for disk swap.

storage/browser/blob/blob_data_snapshot.cc

Index: storage/browser/blob/blob_data_snapshot.cc
diff --git a/storage/browser/blob/blob_data_snapshot.cc b/storage/browser/blob/blob_data_snapshot.cc
index 6ae74cd8d3220eef0ddfea2a2b4d5e87da788fe2..8eb8ee2f57b8d1842a0bb87e9ecb8e3a69886fe3 100644
--- a/storage/browser/blob/blob_data_snapshot.cc
+++ b/storage/browser/blob/blob_data_snapshot.cc
@@ -17,6 +17,14 @@ BlobDataSnapshot::BlobDataSnapshot(
       items_(items) {
 }
 
+BlobDataSnapshot::BlobDataSnapshot(const std::string& uuid,
+                                   const std::string& content_type,
+                                   const std::string& content_disposition)
+    : uuid_(uuid),
+      content_type_(content_type),
+      content_disposition_(content_disposition) {
+}
+
 BlobDataSnapshot::BlobDataSnapshot(const BlobDataSnapshot& other)
     : uuid_(other.uuid_),
       content_type_(other.content_type_),