New snapshot

This is same as https://cos-internal.googlesource.com/cos/manifest-snapshots-internal/+/refs/tags/15458.0.0%5E%21/#F0

BUG=b/171912053

Change-Id: I9d2fb4b11ac6d16bbc147a5e36c4003462b2e833
diff --git a/snapshot.xml b/snapshot.xml
index 035d3d1..e5e7806 100644
--- a/snapshot.xml
+++ b/snapshot.xml
@@ -11,7 +11,7 @@
   <project name="chromiumos/platform/google-breakpad" path="src/third_party/breakpad" remote="chromium" revision="3d8daa2c7458c8e411e691ac6f0d503418ef6231"/>
   <project dest-branch="refs/heads/master" name="chromiumos/platform/microbenchmarks" path="src/platform/microbenchmarks" remote="chromium" revision="a3c495a9f5657c3778e5179d1c1ba073ad26020b" upstream="refs/heads/master"/>
   <project dest-branch="refs/heads/master" name="chromiumos/platform/tast" path="src/platform/tast" remote="chromium" revision="010f898e4ccf0c490428916bce74fb36c133dce1" upstream="refs/heads/master"/>
-  <project dest-branch="refs/heads/master" name="chromiumos/platform/tast-tests" path="src/platform/tast-tests" remote="chromium" revision="f414f1b70acba07f1ca23f80f081a85dc7c17ffa" upstream="refs/heads/master"/>
+  <project dest-branch="refs/heads/master" name="chromiumos/platform/tast-tests" path="src/platform/tast-tests" remote="chromium" revision="6840b6a2b2de9b34575a57d401bade88f7712d16" upstream="refs/heads/master"/>
   <project dest-branch="refs/heads/master" name="cos/cobble" path="src/platform/cobble" revision="a910c096139769e35720174069e81e89bf90fdc6" upstream="refs/heads/master"/>
   <project dest-branch="refs/heads/master" name="cos/manifest" path="manifest" revision="4837a1421b88833d30ada9bc12b445760d350717" upstream="refs/heads/master">
     <copyfile dest="LICENSE" src="LICENSE"/>