Revert of Fix scope flags for default parameters (patchset #2 id:20001 of https://codereview.chromium.org/2042793002/ )

Reason for revert:
Does not fix the bug it intended to fix.

Original issue's description:
> Fix scope flags for default parameters
>
> R=rossberg,adamk
> BUG=chromium:616386
>
> Committed: https://crrev.com/4cc1331c341f5bfbeee54fec521f682a8a406af4
> Cr-Commit-Position: refs/heads/master@{#36755}

TBR=adamk@chromium.org,rossberg@chromium.org,jochen@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:616386

Review-Url: https://codereview.chromium.org/2062593002
Cr-Commit-Position: refs/heads/master@{#36976}