[telemetry] Re-enable testGotQueryParams.

Most of that flow has been rewritten since it was disabled, so assume it's safe to re-enable. The trybot will run the test.
Also change the tests to raise MeasurementFailures, since we keep track of failures and errors separately.


BUG=288631
TEST=Mac trybot

Review URL: https://codereview.chromium.org/83003006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238265 0039d316-1c4b-4281-b951-d872f2087c98
Blink roll 162991:163007

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=162992:163007&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/93953003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238266 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238267 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238267