Fixed IndexedDB blob retention

storage/browser/blob/blob_data_builder.h

Index: storage/browser/blob/blob_data_builder.h
diff --git a/storage/browser/blob/blob_data_builder.h b/storage/browser/blob/blob_data_builder.h
index 0316521de0bed0819744ae9c24293e65b6225760..8119538c07e10ffe2903eea690c4720f1ad269e5 100644
--- a/storage/browser/blob/blob_data_builder.h
+++ b/storage/browser/blob/blob_data_builder.h
@@ -33,20 +33,13 @@ class STORAGE_EXPORT BlobDataBuilder {
   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);