[BlobAsync] Disk support for blob storage

content/child/blob_storage/blob_transport_controller.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 CONTENT_CHILD_BLOB_STORAGE_BLOB_TRANSPORT_CONTROLLER_H_
 #define CONTENT_CHILD_BLOB_STORAGE_BLOB_TRANSPORT_CONTROLLER_H_
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory_handle.h"
 #include "base/memory/weak_ptr.h"
+#include "base/optional.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_platform_file.h"
 #include "storage/common/blob_storage/blob_storage_constants.h"
 
 namespace base {
 template <typename T>
 struct DefaultLazyInstanceTraits;
 class SingleThreadTaskRunner;
 class TaskRunner;
 }
@@ skipping 49 matching lines @@
   // asynchronously. Use CancelAllBlobTransfers to stop usage of the |sender|.
   // We close the file handles once we're done writing to them.
   void OnMemoryRequest(
       const std::string& uuid,
       const std::vector<storage::BlobItemBytesRequest>& requests,
       std::vector<base::SharedMemoryHandle>* memory_handles,
       const std::vector<IPC::PlatformFileForTransit>& file_handles,
       base::TaskRunner* file_runner,
       IPC::Sender* sender);
 
-  void OnCancel(const std::string& uuid,
-                storage::IPCBlobCreationCancelCode code);
-
-  void OnDone(const std::string& uuid);
+  void OnBlobFinalStatus(const std::string& uuid, storage::BlobStatus code);
 
   bool IsTransporting(const std::string& uuid) {
     return blob_storage_.find(uuid) != blob_storage_.end();
   }
 
   // Invalidates all asynchronously running memory request handlers and clears
   // the internal state. If our map wasn't previously empty, then we call
   // ChildProcess::ReleaseProcess to release our previous reference.
   void CancelAllBlobTransfers();
 
@@ skipping 16 matching lines @@
   static void GetDescriptions(BlobConsolidation* consolidation,
                               size_t max_data_population,
                               std::vector<storage::DataElement>* out);
 
   BlobTransportController();
   ~BlobTransportController();
 
   void OnFileWriteComplete(
       IPC::Sender* sender,
       const std::string& uuid,
-      const std::pair<std::vector<storage::BlobItemBytesResponse>,
-                      storage::IPCBlobCreationCancelCode>& result);
+      const base::Optional<std::vector<storage::BlobItemBytesResponse>>&
+          result);
 
   void StoreBlobDataForRequests(
       const std::string& uuid,
       scoped_refptr<BlobConsolidation> consolidation,
       scoped_refptr<base::SingleThreadTaskRunner> main_runner);
 
   // Deletes the consolidation and calls ChildProcess::ReleaseProcess.
   void ReleaseBlobConsolidation(const std::string& uuid);
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_runner_;
   std::map<std::string, scoped_refptr<BlobConsolidation>> blob_storage_;
   base::WeakPtrFactory<BlobTransportController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobTransportController);
 };
 
 }  // namespace content
 #endif  // CONTENT_CHILD_BLOB_STORAGE_BLOB_TRANSPORT_CONTROLLER_H_