Create blobs from Disk Cache entries.

storage/browser/blob/blob_data_item.cc

Index: storage/browser/blob/blob_data_item.cc
diff --git a/storage/browser/blob/blob_data_item.cc b/storage/browser/blob/blob_data_item.cc
index 504a1c3e8be39939d58c0ac19702f7c6d3e2ac89..17dcafb6ead68a89620ec4076763e969ec39750f 100644
--- a/storage/browser/blob/blob_data_item.cc
+++ b/storage/browser/blob/blob_data_item.cc
@@ -6,12 +6,30 @@
 
 namespace storage {
 
-BlobDataItem::BlobDataItem(scoped_ptr<DataElement> item,
-                           scoped_refptr<ShareableFileReference> file_handle)
-    : item_(item.Pass()), file_handle_(file_handle) {
+disk_cache::Entry* BlobDataItem::DataHandle::disk_cache_entry() const {
+  return nullptr;
+}
+
+BlobDataItem::DataHandle::~DataHandle() {
 }
+
 BlobDataItem::BlobDataItem(scoped_ptr<DataElement> item) : item_(item.Pass()) {
 }
+
+BlobDataItem::BlobDataItem(scoped_ptr<DataElement> item,
+                           const scoped_refptr<DataHandle>& data_handle)
+    : item_(item.Pass()),
+      data_handle_(data_handle) {
+}
+
+BlobDataItem::BlobDataItem(scoped_ptr<DataElement> item,
+                           const scoped_refptr<DataHandle>& data_handle,
+                           int disk_cache_stream_index)
+    : item_(item.Pass()),
+      data_handle_(data_handle),
+      disk_cache_stream_index_(disk_cache_stream_index) {
+}
+
 BlobDataItem::~BlobDataItem() {
 }