[BlobAsync] Disk support for blob storage

storage/browser/blob/blob_async_transport_request_builder.h

 // Copyright 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_ASYNC_TRANSPORT_REQUEST_BUILDER_H_
 #define STORAGE_BROWSER_BLOB_BLOB_ASYNC_TRANSPORT_REQUEST_BUILDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 96 matching lines @@
 
   // The requests for memory, segmented as described above, along with their
   // destination browser indexes and offsets.
   const std::vector<RendererMemoryItemRequest>& requests() const {
     return requests_;
   }
 
   // The total bytes size of memory items in the blob.
   uint64_t total_bytes_size() const { return total_bytes_size_; }
 
-  static bool ShouldBeShortcut(const std::vector<DataElement>& items,
-                               size_t memory_available);
-
  private:
   static void ComputeHandleSizes(uint64_t total_memory_size,
                                  size_t max_segment_size,
                                  std::vector<size_t>* segment_sizes);
 
   std::vector<size_t> shared_memory_sizes_;
   // The size of the files is capped by the |max_file_size| argument in
   // InitializeForFileRequests, so we can just use size_t.
   std::vector<size_t> file_sizes_;
 
   uint64_t total_bytes_size_;
   std::vector<RendererMemoryItemRequest> requests_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobAsyncTransportRequestBuilder);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_BLOB_BLOB_ASYNC_TRANSPORT_REQUEST_BUILDER_H_