There is no more glitch on Paint Preview from the upstream, so this patch is obsolete. Chromium change: https://github.com/brave/chromium/commit/bc0349169ff178b7a3adbc127ef3e4db3e23824c cleanup: Remove StartupPaintPreviewHelper.isEnabled The method isEnabled() always returns true, and there is no plan to change it. Remove the method and its callsite and beautify one unrelated assert slightly. Bug: 1321121