Add support in Telemetry for other Ozone based targets

Prior to this commit, Telemetry on Linux Desktop was X11 oriented. The changes
introduced here allow other graphics architectures through Ozone as well for
testing, by recognizing a specific extra browser arguments "--ozone-platform".

For example one can use it as following:

./run_benchmark --browser=exact --browser-executable=./out/Release/chrome --extra-browser-args="--ozone-platform=gbm" <benchmark>

BUG=None

Review URL: https://codereview.chromium.org/901143006

Cr-Commit-Position: refs/heads/master@{#317671}
1 file changed