Roll third_party/depot_tools/ d912aa913..68978076f (26 commits; 7 trivial rolls)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/d912aa91339c..68978076fdb7

Created with:
  roll-dep third_party/depot_tools

Tbr: tsepez@chromium.org
Change-Id: I9711d2893f8656cbd120769a66a18b30304d0d61
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/71492
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/DEPS b/DEPS
index cea494b..a5117b0 100644
--- a/DEPS
+++ b/DEPS
@@ -60,7 +60,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling depot_tools
   # and whatever else without interference from each other.
-  'depot_tools_revision': 'd912aa91339c5563ee8a9cfbd362c6c252d58188',
+  'depot_tools_revision': '68978076fdb7c01737d097fea0763f9745463b1d',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling freetype
   # and whatever else without interference from each other.