telemetry: add additional discrepancy test cases

Add two additional test cases with collocated samples.

R=tonyg@chromium.org
BUG=357363

Review URL: https://codereview.chromium.org/226613004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@261981 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed