Add SetUploadDataStream 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 4796d2459e6b098c7b181dd932d253506761b527..072433b61d6f92507a0480d9f195ce2a55871006 100644
--- a/net/url_request/url_fetcher_core.h
+++ b/net/url_request/url_fetcher_core.h
@@ -63,6 +63,8 @@ class URLFetcherCore
 
   // For POST requests, set |content_type| to the MIME type of the
   // content and set |content| to the data to upload.
+  void SetUploadDataStream(const std::string& upload_content_type,
+                           scoped_ptr<UploadDataStream> upload_content);
   void SetUploadData(const std::string& upload_content_type,
                      const std::string& upload_content);
   void SetChunkedUpload(const std::string& upload_content_type);
@@ -338,7 +340,7 @@ class URLFetcherCore
   bool was_fetched_via_proxy_;
   HostPortPair socket_address_;
 
-  std::string upload_content_;       // HTTP POST payload
+  scoped_ptr<UploadDataStream> upload_content_;  // HTTP POST payload
   std::string upload_content_type_;  // MIME type of POST payload
   std::string referrer_;             // HTTP Referer header value
   bool is_chunked_upload_;           // True if using chunked transfer encoding