tree 4cefc9dfbf1a9a9aae25645dc8e530817cdb6c14
parent 264905dfa78362e694a3ddaa08828cf2bdd0dc56
author Stephen Li <stephenli@google.com> 1498600498 -0700
committer Stephen Li <stephenli@google.com> 1499387922 -0700

Stacked changes continue being stacked downstream.

Previously, if change A and B were uplaoded, where Bs first parent was
A, then the first parents of both A and B were HEAD of the downstream
branch.
Now, if changes A and B are uploaded, where Bs first parent is A, then for
downstream A' and B', the first parent of B' should be A'.

Change-Id: I09a9abc6320129f64958859efc2e379214903e54