Set the original url correctly if the frame is loaded via loadData Base URL

Upstream fix: https://codereview.chromium.org/176883012
BUG: b/13206940
This is not a direct cherry pick because this code schange get refactored
into render_frame_impl in chromium trunk.

Change-Id: If807722dfee9b8570bb0b54e53c383f857a57fd1
2 files changed