Switch graphics_WebGLPerformance to telemetry.

And delete dependency on pyauto.
Also create separate deps for the content.

BUG=chromium:341333
TEST=test_that -b link 172.22.71.106 graphics_WebGLPerformance
CQ-DEPEND=185180
Change-Id: I32dfab349623ad8a7abd6dffa411f4a10a7b130c
Reviewed-on: https://chromium-review.googlesource.com/185292
Reviewed-by: Ilja Friedel <ihf@chromium.org>
Tested-by: Ilja Friedel <ihf@chromium.org>
Commit-Queue: Ilja Friedel <ihf@chromium.org>
9 files changed