[BlobAsync] Disk support for blob storage

storage/browser/blob/internal_blob_data.cc

Index: storage/browser/blob/internal_blob_data.cc
diff --git a/storage/browser/blob/internal_blob_data.cc b/storage/browser/blob/internal_blob_data.cc
index 115c6a65e1f45265dff05d18054bf404455ecbfa..0668cfe1d4d60e828b62baaa0b60461583a69304 100644
--- a/storage/browser/blob/internal_blob_data.cc
+++ b/storage/browser/blob/internal_blob_data.cc
@@ -16,38 +16,19 @@
 
 namespace storage {
 
-InternalBlobData::Builder::Builder() : data_(new InternalBlobData()) {
-}
-InternalBlobData::Builder::~Builder() {
-}
-
-void InternalBlobData::Builder::AppendSharedBlobItem(
-    scoped_refptr<ShareableBlobDataItem> item) {
-  DCHECK(item);
-  DCHECK(data_);
-  data_->items_.push_back(item);
-}
+InternalBlobData::InternalBlobData() {}
 
-void InternalBlobData::Builder::RemoveBlobFromShareableItems(
-    const std::string& blob_uuid) {
-  DCHECK(data_);
-  data_->RemoveBlobFromShareableItems(blob_uuid);
-}
-
-size_t InternalBlobData::Builder::GetNonsharedMemoryUsage() const {
-  DCHECK(data_);
-  return data_->GetUnsharedMemoryUsage();
-}
-
-std::unique_ptr<InternalBlobData> InternalBlobData::Builder::Build() {
-  DCHECK(data_);
-  return std::move(data_);
-}
+InternalBlobData::~InternalBlobData() {}
 
-InternalBlobData::InternalBlobData() {
-}
-
-InternalBlobData::~InternalBlobData() {
+void InternalBlobData::AppendSharedBlobItem(
+    const std::string& my_uuid,
+    scoped_refptr<ShareableBlobDataItem> item) {
+  if (!items_.empty()) {
+    offsets_.push_back(size_);
+  }
+  size_ += item->item()->length();
+  item->referencing_blobs().insert(my_uuid);
+  items_.push_back(std::move(item));
 }
 
 const std::vector<scoped_refptr<ShareableBlobDataItem>>&
@@ -71,27 +52,11 @@ size_t InternalBlobData::GetUnsharedMemoryUsage() const {
         seen_items.find(data_item.get()) != seen_items.end()) {
       continue;
     }
+    LOG(ERROR) << "no one else has item " << data_item->item_id();
     memory += data_item->item()->length();
     seen_items.insert(data_item.get());
   }
   return memory;
 }
 
-void InternalBlobData::GetMemoryUsage(size_t* total_memory,
-                                      size_t* unshared_memory) {
-  *total_memory = 0;
-  *unshared_memory = 0;
-  base::hash_set<void*> seen_items;
-  for (const auto& data_item : items_) {
-    if (data_item->item()->type() == DataElement::TYPE_BYTES) {
-      *total_memory += data_item->item()->length();
-      if (data_item->referencing_blobs().size() == 1 &&
-          seen_items.find(data_item.get()) == seen_items.end()) {
-        *unshared_memory += data_item->item()->length();
-        seen_items.insert(data_item.get());
-      }
-    }
-  }
-}
-
 }  // namespace storage