This filters test and third_party files to get a speed-up
when running tests and when collecting profile data.

BUG=chromium:568949
LOG=n

Committed: https://crrev.com/761ee31be5ab4fde05c294e5d632608fbaea8ad4
Cr-Commit-Position: refs/heads/master@{#34216}

Review URL: https://codereview.chromium.org/1730543002

Cr-Commit-Position: refs/heads/master@{#34253}