Revert of [Storage] Consoliation of BlobItems with small size

storage/common/data_element.h

Index: storage/common/data_element.h
diff --git a/storage/common/data_element.h b/storage/common/data_element.h
index 24a494a2f6f0e09303878871e77e4e952273230f..bdc881296acab626574d2981697c8a7f10cbeb2c 100644
--- a/storage/common/data_element.h
+++ b/storage/common/data_element.h
@@ -50,28 +50,8 @@
     length_ = buf_.size();
   }
 
-  // Sets TYPE_BYTES data, and clears the internal bytes buffer.
-  // For use with AppendBytes.
-  void SetToEmptyBytes() {
-    type_ = TYPE_BYTES;
-    buf_.clear();
-    length_ = 0;
-    bytes_ = nullptr;
-  }
-
-  // Copies and appends the given data into the element. SetToEmptyBytes or
-  // SetToBytes must be called before this method.
-  void AppendBytes(const char* bytes, int bytes_len) {
-    DCHECK_EQ(type_, TYPE_BYTES);
-    DCHECK_NE(length_, kuint64max);
-    DCHECK(!bytes_);
-    buf_.insert(buf_.end(), bytes, bytes + bytes_len);
-    length_ += buf_.size();
-  }
-
   // Sets TYPE_BYTES data. This does NOT copy the given data and the caller
   // should make sure the data is alive when this element is accessed.
-  // You cannot use AppendBytes with this method.
   void SetToSharedBytes(const char* bytes, int bytes_len) {
     type_ = TYPE_BYTES;
     bytes_ = bytes;