net: Add SetUploadStream method to URLFetcher.

net/url_request/url_fetcher.h

Index: net/url_request/url_fetcher.h
diff --git a/net/url_request/url_fetcher.h b/net/url_request/url_fetcher.h
index 5dcaedde0a9d7945a10bf9f2c40d0a086a8960d1..18c031bcdb0f3c97f650308aada39f7a451b7260 100644
--- a/net/url_request/url_fetcher.h
+++ b/net/url_request/url_fetcher.h
@@ -149,6 +149,15 @@ class NET_EXPORT URLFetcher {
       uint64 range_length,
       scoped_refptr<base::TaskRunner> file_task_runner) = 0;
 
+  // Sets data only needed by POSTs.  All callers making POST requests should
+  // call one of the SetUpload* methods before the request is started.
+  // |upload_content_type| is the MIME type of the content, while
+  // |upload_stream| is the data to be sent (the Content-Length header value
+  // will be set to the length of this data).
+  virtual void SetUploadStream(
+      const std::string& upload_content_type,
+      scoped_ptr<net::UploadDataStream> upload_stream) = 0;

[mmenke, 2014/12/18 15:38:46]

Why is this needed?  This is incompatible with all of the retry stuff, and I'd
rather not have incompatible features unless it's really needed.

+
   // Indicates that the POST data is sent via chunked transfer encoding.
   // This may only be called before calling Start().
   // Use AppendChunkToUpload() to give the data chunks after calling Start().