Fixed IndexedDB blob retention

storage/browser/blob/blob_data_builder.h

 // 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.
 
 #ifndef STORAGE_BROWSER_BLOB_BLOB_DATA_BUILDER_H_
 #define STORAGE_BROWSER_BLOB_BLOB_DATA_BUILDER_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 15 matching lines @@
 
   const std::string& uuid() const { return uuid_; }
 
   void AppendData(const std::string& data) {
     AppendData(data.c_str(), data.size());
   }
 
   void AppendData(const char* data, size_t length);
 
   // You must know the length of the file, you cannot use kuint64max to specify
-  // the whole file.
+  // the whole file.  This method creates a ShareableFileReference to the given
+  // file, which is stored in this builder.
   void AppendFile(const base::FilePath& file_path,
                   uint64_t offset,
                   uint64_t length,
                   const base::Time& expected_modification_time);
 
-  // You must know the length of the file, you cannot use kuint64max to specify
-  // the whole file.
-  void AppendFile(const base::FilePath& file_path,
-                  uint64_t offset,
-                  uint64_t length,
-                  const base::Time& expected_modification_time,
-                  scoped_refptr<ShareableFileReference> shareable_file);
-
   void AppendBlob(const std::string& uuid, uint64_t offset, uint64_t length);
 
   void AppendBlob(const std::string& uuid);
 
   void AppendFileSystemFile(const GURL& url,
                             uint64_t offset,
                             uint64_t length,
                             const base::Time& expected_modification_time);
 
   void set_content_type(const std::string& content_type) {
@@ skipping 53 matching lines @@
   return !(a == b);
 }
 
 inline bool operator!=(const BlobDataBuilder& a, const BlobDataBuilder& b) {
   return !(a == b);
 }
 #endif  // defined(UNIT_TEST)
 
 }  // namespace storage
 #endif  // STORAGE_BROWSER_BLOB_BLOB_DATA_BUILDER_H_