Revert r154330 "Make run-perf-tests a wrapper around Telemetry."

This reverts r154330 ( https://src.chromium.org/viewvc/blink?view=rev&revision=154330 )
and restores the old functionality in run-perf-tests, with one major exception:
we no longer support replay-based tests. This patch contains the straight
up revert, and then removes all of the replay-based code and the tests in
PerformanceTests/Replay . Ideally we'd only support replay-based testing
through the telemetry-based perf testing infrastructure.

If this is a problem, I can restore the replay-based tests and check in
webpagereplay as a workaround.

Note that we reverted the change because we lost too much functionality
by switching to the wrapper. See comments in
https://codereview.chromium.org/19723002/ and
https://codereview.chromium.org/18259011

TBR=tonyg@chromium.org, eseidel@chromium.org, marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/19670011

git-svn-id: svn://svn.chromium.org/blink/trunk@154456 bbb929c8-8fbe-4397-9dbb-9b2b20218538