Update 4472 DEPS for M91 branching

TBR=chrome-product-tpgm@google.com

Change-Id: I337d637c0cba67f26a37540d654fc5ac480f9c5c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2818563
Reviewed-by: Srinivas Sista <srinivassista@chromium.org>
Reviewed-by: Haiyang Pan <hypan@google.com>
Owners-Override: Srinivas Sista <srinivassista@chromium.org>
Auto-Submit: Srinivas Sista <srinivassista@chromium.org>
Commit-Queue: Haiyang Pan <hypan@google.com>
Cr-Commit-Position: refs/branch-heads/4472@{#4}
Cr-Branched-From: 3d60439-refs/heads/master@{#870763}

DEPS

@@ -206,11 +206,11 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': 'b99622c05aa071606921ab35a4b59fba5305669d',
+  'skia_revision': 'refs/heads/chrome/m91',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.
-  'v8_revision': 'refs/heads/chromium/4472',
+  'v8_revision': 'refs/heads/9.1-lkgr',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.