Split net::UploadData into two: for IPC and for upload handling

net/base/upload_data.cc

Index: net/base/upload_data.cc
diff --git a/net/base/upload_data.cc b/net/base/upload_data.cc
index b13e9091e8cb0051caeb26a516ba1cd806f600d0..47aa00fa95af8dae79461cfb0ebbafc40d013ee8 100644
--- a/net/base/upload_data.cc
+++ b/net/base/upload_data.cc
@@ -66,9 +66,6 @@ uint64 UploadData::Element::GetContentLength() {
 
   if (type_ == TYPE_BYTES || type_ == TYPE_CHUNK)
     return static_cast<uint64>(bytes_.size());
-  else if (type_ == TYPE_BLOB)
-    // The blob reference will be resolved later.
-    return 0;
 
   DCHECK_EQ(TYPE_FILE, type_);
   DCHECK(!file_stream_);
@@ -230,12 +227,6 @@ void UploadData::AppendFileRange(const FilePath& file_path,
                                       expected_modification_time);
 }
 
-void UploadData::AppendBlob(const GURL& blob_url) {
-  DCHECK(!is_chunked_);
-  elements_.push_back(Element());
-  elements_.back().SetToBlobUrl(blob_url);
-}
-
 void UploadData::AppendChunk(const char* bytes,
                              int bytes_len,
                              bool is_last_chunk) {