GitLab

Implements the infrastructure to allow different platforms to
selectively enable the profiler on different threads. Retains the
enabling on all supported threads in the default configuration and
sets the state to disabled on all supported thread for Android,
pending launch on that platform.

Bug: 1129939
Change-Id: Iaec50b3aca4d3d7e2a75aa2015a09da53bfb80b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2431456
Commit-Queue: Mike Wittman <wittman@chromium.org>
Reviewed-by: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812392}