[BlobAsync] Disk support for blob storage

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 f304f446555cff8fa0f9291fea32bb2a95b72051..119bb21e9bebb32dd8b3bd3d973d76f231bbdc4a 100644
--- a/storage/browser/blob/blob_data_builder.h
+++ b/storage/browser/blob/blob_data_builder.h
@@ -16,6 +16,7 @@
 #include "base/memory/ref_counted.h"
 #include "storage/browser/blob/blob_data_item.h"
 #include "storage/browser/blob/blob_data_snapshot.h"
+#include "storage/browser/blob/shareable_file_reference.h"
 #include "storage/browser/storage_browser_export.h"
 
 namespace disk_cache {
@@ -94,6 +95,14 @@ class STORAGE_EXPORT BlobDataBuilder {
                   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 AppendShareableFileReference(
+      const scoped_refptr<ShareableFileReference> file,
+      uint64_t offset,
+      uint64_t length,
+      const base::Time& expected_modification_time);
+
   void AppendBlob(const std::string& uuid, uint64_t offset, uint64_t length);
 
   void AppendBlob(const std::string& uuid);
@@ -106,6 +115,7 @@ class STORAGE_EXPORT BlobDataBuilder {
   void AppendDiskCacheEntry(const scoped_refptr<DataHandle>& data_handle,
                             disk_cache::Entry* disk_cache_entry,
                             int disk_cache_stream_index);
+
   // The content of the side data is accessible with BlobReader::ReadSideData().
   void AppendDiskCacheEntryWithSideData(
       const scoped_refptr<DataHandle>& data_handle,
@@ -124,8 +134,9 @@ class STORAGE_EXPORT BlobDataBuilder {
   void Clear();
 
  private:
-  friend class BlobStorageContext;
   friend class BlobAsyncBuilderHostTest;
+  friend class BlobFlattener;
+  friend class BlobStorageContext;
   friend bool operator==(const BlobDataBuilder& a, const BlobDataBuilder& b);
   friend bool operator==(const BlobDataSnapshot& a, const BlobDataBuilder& b);
   friend STORAGE_EXPORT void PrintTo(const BlobDataBuilder& x,