GitLab

- This is the first step in implementing never-slow-mode in chrome.
- Both flags are disabled by default.
- Blink runtime flag will use the chromium feature state.

Bug: 892672
Change-Id: I2098e435628219ffe5a798d485d73e1e0c590bc7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1864331Reviewed-by: Jason Chase <chasej@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Rodney Ding <rodneyding@google.com>
Cr-Commit-Position: refs/heads/master@{#707482}