Roll tools/memory/ 2a4c4ba1f..68be21429 (2 commits)

https://chromium.googlesource.com/chromium/src/tools/memory/+log/2a4c4ba1f4a9..68be21429138

Created with:
  roll-dep tools/memory

Change-Id: Id75d865879fa1dcd4034bcf2e541404eaffe1bc7
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/111574
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index c0f47f9..b85e3f9 100644
--- a/DEPS
+++ b/DEPS
@@ -172,7 +172,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling tools_memory
   # and whatever else without interference from each other.
-  'tools_memory_revision': '2a4c4ba1f4a94231b01280a0c63d3fe4404cc9c2',
+  'tools_memory_revision': '68be214291389b563441d7d4e028333deb168463',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling trace_event
   # and whatever else without interference from each other.