[BlobAsync] Patch 2: Common Constants

storage/browser/blob/blob_data_item.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_item.h"
 
 namespace storage {
 
 BlobDataItem::DataHandle::~DataHandle() {
 }
@@ skipping 15 matching lines @@
 BlobDataItem::BlobDataItem(scoped_ptr<DataElement> item,
                            const scoped_refptr<DataHandle>& data_handle,
                            disk_cache::Entry* entry,
                            int disk_cache_stream_index)
     : item_(item.Pass()),
       data_handle_(data_handle),
       disk_cache_entry_(entry),
       disk_cache_stream_index_(disk_cache_stream_index) {
 }
 
-BlobDataItem::~BlobDataItem() {
+BlobDataItem::~BlobDataItem() {}
+
+void PrintTo(const BlobDataItem& x, ::std::ostream* os) {
+  DCHECK(os);
+  *os << "<BlobDataItem>{item: ";
+  PrintTo(*x.item_, os);
+  *os << ", has_data_handle: " << (x.data_handle_.get() ? "true" : "false")
+      << ", disk_cache_entry_ptr: " << x.disk_cache_entry_
+      << ", disk_cache_stream_index_: " << x.disk_cache_stream_index_ << "}";
 }
 
 }  // namespace storage