[Storage] Blob Storage Refactoring pt 1

storage/browser/blob/blob_data_snapshot.cc

+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "storage/browser/blob/blob_data_snapshot.h"
+
+namespace storage {
+
+BlobDataSnapshot::BlobDataSnapshot(
+    const std::string& uuid,
+    const std::string& content_type,
+    const std::string& content_disposition,
+    const std::vector<scoped_refptr<BlobDataItem>>& items)
+    : uuid_(uuid),
+      content_type_(content_type),
+      content_disposition_(content_disposition),
+      items_(items) {
+}
+
+BlobDataSnapshot::BlobDataSnapshot(const BlobDataSnapshot& other)
+    : uuid_(other.uuid_),
+      content_type_(other.content_type_),
+      content_disposition_(other.content_disposition_),
+      items_(other.items_) {
+}
+
+BlobDataSnapshot::~BlobDataSnapshot() {
+}
+
+size_t BlobDataSnapshot::GetMemoryUsage() const {
+  int64 memory = 0;
+  for (const auto& data_item : items_) {
+    if (data_item->type() == DataElement::TYPE_BYTES)
+      memory += data_item->length();
+  }
+  return memory;
+}
+
+}  // namespace storage