[Blob] Blob paging to disk patch.

storage/browser/blob/blob_data_builder.cc

Index: storage/browser/blob/blob_data_builder.cc
diff --git a/storage/browser/blob/blob_data_builder.cc b/storage/browser/blob/blob_data_builder.cc
index 69d9773bf7d00ce6e0c197c60c9f271e9b3de520..6b7f543a089b204f271202bcfc183fef074450fd 100644
--- a/storage/browser/blob/blob_data_builder.cc
+++ b/storage/browser/blob/blob_data_builder.cc
@@ -8,7 +8,6 @@
 #include "base/numerics/safe_math.h"
 #include "base/time/time.h"
 #include "net/disk_cache/disk_cache.h"
-#include "storage/browser/blob/shareable_file_reference.h"
 
 namespace storage {
 
@@ -142,6 +141,17 @@ void BlobDataBuilder::AppendFile(const base::FilePath& file_path,
       new BlobDataItem(element.Pass(), ShareableFileReference::Get(file_path)));
 }
 
+void BlobDataBuilder::AppendShareableFileReference(
+    const scoped_refptr<ShareableFileReference> file,
+    uint64_t offset,
+    uint64_t length,
+    const base::Time& expected_modification_time) {
+  scoped_ptr<DataElement> element(new DataElement());
+  element->SetToFilePathRange(file->path(), offset, length,
+                              expected_modification_time);
+  items_.push_back(new BlobDataItem(element.Pass(), file));
+}
+
 void BlobDataBuilder::AppendBlob(const std::string& uuid,
                                  uint64_t offset,
                                  uint64_t length) {