* chore: bump chromium in DEPS to 91.0.4464.0

* chore: rebuild chromium/dcheck.patch with import-patches -3

Mechanical only; no code changes

* chore: remove content_browser_main_loop.patch

Refs: https://chromium-review.googlesource.com/c/chromium/src/+/2725153

The function being patched (BrowserMainLoop::MainMessageLoopRun()) no
longer exists.

NB: if removing this introduces regressions the likely fix will be to
add a similar patch for ShellBrowserMainParts::WillRunMainMessageLoop()
which has similar code and was added at the same time this was removed.

* chore: rebuild chromium/put_back_deleted_colors_for_autofill.patch with import-patches -3

Mechanical only; no code changes

* chore: rebuild chromium/disable_color_correct_rendering.patch with import-patches -3

Mechanical only; no code changes

* chore: rebuild chromium/eat_allow_disabling_blink_scheduler_throttling_per_renderview.patch with patch

Mechanical only; ...