[BlobAsync] Asynchronous Blob Construction Final Patch

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 <stddef.h>
 #include <stdint.h>
 
 #include "storage/browser/blob/blob_data_snapshot.h"
 
 namespace storage {
@@ skipping 29 matching lines @@
 
 size_t BlobDataSnapshot::GetMemoryUsage() const {
   int64_t memory = 0;
   for (const auto& data_item : items_) {
     if (data_item->type() == DataElement::TYPE_BYTES)
       memory += data_item->length();
   }
   return memory;
 }
 
+void PrintTo(const BlobDataSnapshot& x, std::ostream* os) {
+  DCHECK(os);
+  *os << "<BlobDataSnapshot>{uuid: " << x.uuid()
+      << ", content_type: " << x.content_type_
+      << ", content_disposition: " << x.content_disposition_ << ", items: [";
+  for (const auto& item : x.items_) {
+    PrintTo(*item, os);
+    *os << ", ";
+  }
+  *os << "]}";
+}
+
 }  // namespace storage