net: Add SetUploadStream method to URLFetcher.

net/url_request/url_fetcher_core.h

Index: net/url_request/url_fetcher_core.h
diff --git a/net/url_request/url_fetcher_core.h b/net/url_request/url_fetcher_core.h
index 6bf449f5671ea4abeb666b1aaf867114941cf1f9..dac7bd858b8ed5a5058cb87193ebe1f3170c8a15 100644
--- a/net/url_request/url_fetcher_core.h
+++ b/net/url_request/url_fetcher_core.h
@@ -68,6 +68,9 @@ class URLFetcherCore
                          uint64 range_offset,
                          uint64 range_length,
                          scoped_refptr<base::TaskRunner> file_task_runner);
+  void SetUploadStreamFactory(
+      const std::string& upload_content_type,
+      const URLFetcher::CreateUploadStreamCallback& callback);
   void SetChunkedUpload(const std::string& upload_content_type);
   // Adds a block of data to be uploaded in a POST body. This can only be
   // called after Start().
@@ -239,6 +242,8 @@ class URLFetcherCore
                                      // to be uploaded.
   uint64 upload_range_length_;       // The length of the part of file to be
                                      // uploaded.
+  URLFetcher::CreateUploadStreamCallback
+      upload_stream_factory_;        // Callback to create HTTP POST payload.
   std::string upload_content_type_;  // MIME type of POST payload
   std::string referrer_;             // HTTP Referer header value and policy
   URLRequest::ReferrerPolicy referrer_policy_;