[BlobAsync] Disk support for blob storage

storage/browser/blob/blob_storage_registry.cc

Index: storage/browser/blob/blob_storage_registry.cc
diff --git a/storage/browser/blob/blob_storage_registry.cc b/storage/browser/blob/blob_storage_registry.cc
index a0f03b25fd42a73fbd3cff7e6358c33992c27243..080bfbd3ae4a61c4e2ba99efd55127dc282b0a6f 100644
--- a/storage/browser/blob/blob_storage_registry.cc
+++ b/storage/browser/blob/blob_storage_registry.cc
@@ -14,10 +14,11 @@
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
+#include "storage/browser/blob/blob_data_handle.h"
+#include "storage/browser/blob/shareable_blob_data_item.h"
 #include "url/gurl.h"
 
 namespace storage {
-using BlobState = BlobStorageRegistry::BlobState;
 
 namespace {
 // We can't use GURL directly for these hash fragment manipulations
@@ -38,18 +39,22 @@ GURL ClearBlobUrlRef(const GURL& url) {
 
 }  // namespace
 
-BlobStorageRegistry::Entry::Entry(int refcount, BlobState state)
-    : refcount(refcount), state(state) {}
+BlobStorageRegistry::ItemCopyEntry::ItemCopyEntry(
+    scoped_refptr<ShareableBlobDataItem> source_item,
+    size_t source_item_offset,
+    scoped_refptr<ShareableBlobDataItem> dest_item)
+    : source_item(std::move(source_item)),
+      source_item_offset(source_item_offset),
+      dest_item(std::move(dest_item)) {}
 
-BlobStorageRegistry::Entry::~Entry() {}
+BlobStorageRegistry::ItemCopyEntry::ItemCopyEntry(const ItemCopyEntry&) =
+    default;
 
-bool BlobStorageRegistry::Entry::TestAndSetState(BlobState expected,
-                                                 BlobState set) {
-  if (state != expected)
-    return false;
-  state = set;
-  return true;
-}
+BlobStorageRegistry::ItemCopyEntry::~ItemCopyEntry() {}
+
+BlobStorageRegistry::Entry::Entry() {}
+
+BlobStorageRegistry::Entry::~Entry() {}
 
 BlobStorageRegistry::BlobStorageRegistry() {}
 
@@ -64,7 +69,7 @@ BlobStorageRegistry::Entry* BlobStorageRegistry::CreateEntry(
     const std::string& content_type,
     const std::string& content_disposition) {
   DCHECK(!ContainsKey(blob_map_, uuid));
-  std::unique_ptr<Entry> entry(new Entry(1, BlobState::PENDING));
+  std::unique_ptr<Entry> entry(new Entry());
   entry->content_type = content_type;
   entry->content_disposition = content_disposition;
   Entry* entry_ptr = entry.get();