Fix results processing to handle "JSON.stringify" in Telemetry results.

This is the same as the previous CL; I had to abandon the previous CL
because it erroneously depended on a different abandoned CL, so it refused
to commit.

BUG=none
TEST=I ran the telemetry tests with the modification and now ALL of them
give good output (before only about half of them did).

Change-Id: I567f51176c522bc1c41676f6dc560f3827b9cef4
Reviewed-on: https://gerrit-int.chromium.org/42930
Reviewed-by: Bhaskar Janakiraman <bjanakiraman@google.com>
Commit-Queue: Caroline  Tice <cmtice@google.com>
Tested-by: Caroline  Tice <cmtice@google.com>
1 file changed