Fix a pair of Cronet upload bugs and add tests.

net/base/net_error_list.h

Index: net/base/net_error_list.h
diff --git a/net/base/net_error_list.h b/net/base/net_error_list.h
index ae2ff1356d1d53d0fc0f3b538a479b2272eb08d2..89fbfff08c1cc302367f84a938bf0c2685718c8e 100644
--- a/net/base/net_error_list.h
+++ b/net/base/net_error_list.h
@@ -99,6 +99,10 @@ NET_ERROR(SOCKET_IS_CONNECTED, -23)
 // The error can be emitted by code in chrome/browser/policy/policy_helpers.cc.
 NET_ERROR(BLOCKED_ENROLLMENT_CHECK_PENDING, -24)
 
+// The upload failed because the upload stream needed to be re-read, due to a
+// retry or a redirect, but the upload stream doesn't support that operation.
+NET_ERROR(UPLOAD_STREAM_REWIND_NOT_SUPPORTED, -25)

[xunjieli, 2014/10/17 20:56:45]

Is it possible to test that we get this error code?

[mmenke, 2014/10/17 21:27:15]

I don't believe we expose it with the current API - we should with the new one,
but I don't think it's worth adding much more to the old one.

+
 // A connection was closed (corresponding to a TCP FIN).
 NET_ERROR(CONNECTION_CLOSED, -100)