GitLab

Refactors the GPU Telemetry code to do the following:
1. Move arguments that are used more than once to constants in a new
   file.
2. Standardize how browser arguments are determined. Now, tests only
   call either CustomizeBrowserArgs() or
   RestartBrowserIfNecessaryWithArgs() with any non-default args to use.
   The base class now handles application of child class-specific
   default arguments using the GenerateBrowserArgs() class method.
3. Move the --disable-metal-test-shaders argument to be applied to all
   GPU tests, not just WebGL ones.

Bug: 1085899, 1090480
Change-Id: I9f73d5953420cb5b5c8bd3f71d4b091751a92595
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2300801
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789137}