Roll tools/rust/ 9f2ba7f84..e721a72ad (11 commits)

https://chromium.googlesource.com/chromium/src/tools/rust/+log/9f2ba7f84988..e721a72ada16

Created with:
  roll-dep tools/rust

Change-Id: I0f9557acbe7c0caf139d94401faff413f349de17
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/115151
Auto-Submit: Andy Phan <andyphan@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 620ac6e..cc3b2a5 100644
--- a/DEPS
+++ b/DEPS
@@ -182,7 +182,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling clang
   # and whatever else without interference from each other.
-  'rust_revision': '9f2ba7f84988470627950863df3e2961ff3cc0d0',
+  'rust_revision': 'e721a72ada161eee9693d6d96fcbdb6155c7a8b1',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling skia
   # and whatever else without interference from each other.