Reorder PpdProvider URLFetch callback

Now we check that status code of the returned URL fetch prior to
checking the returned contents.

Bug: none
Test: All tests still pass
Change-Id: I0b5e868230b480c498bd442b8d6f42c4fb4464d2
Reviewed-on: https://chromium-review.googlesource.com/c/1407262
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Luum Habtemariam <luum@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622277}
1 file changed