net: Move ownership of UploadDataStream from URLRequestHttpJob to URLRequest

net/base/upload_data_stream.h

Index: net/base/upload_data_stream.h
diff --git a/net/base/upload_data_stream.h b/net/base/upload_data_stream.h
index 520abce57f30d2d1899dc45034fb5b8d6dd362ca..021b6cadbff9d317be35754486da5c9c67f857db 100644
--- a/net/base/upload_data_stream.h
+++ b/net/base/upload_data_stream.h
@@ -74,6 +74,10 @@ class NET_EXPORT UploadDataStream {
 
   bool is_chunked() const;
 
+  const ScopedVector<UploadElementReader>& element_readers() const {
+    return element_readers_;
+  }
+
   // Returns true if all data has been consumed from this upload data
   // stream.
   bool IsEOF() const;