Re-enable msan bots

Bug: b/329130536
Change-Id: I4bc9102a3fda16121cb42d682f80a7b124daed42
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/343180
Reviewed-by: Jeremy Leconte <jleconte@google.com>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41905}
diff --git a/infra/config/commit-queue.cfg b/infra/config/commit-queue.cfg
index c6d9ad0..7efd399 100644
--- a/infra/config/commit-queue.cfg
+++ b/infra/config/commit-queue.cfg
@@ -127,6 +127,9 @@
         name: "webrtc/try/linux_more_configs"
       }
       builders {
+        name: "webrtc/try/linux_msan"
+      }
+      builders {
         name: "webrtc/try/linux_rel"
       }
       builders {
@@ -301,6 +304,9 @@
         name: "webrtc/try/linux_more_configs"
       }
       builders {
+        name: "webrtc/try/linux_msan"
+      }
+      builders {
         name: "webrtc/try/linux_rel"
       }
       builders {
diff --git a/infra/config/config.star b/infra/config/config.star
index cea4883..c070fa4 100755
--- a/infra/config/config.star
+++ b/infra/config/config.star
@@ -52,9 +52,7 @@
 # Add names of builders to remove from LKGR finder to this list. This is
 # useful when a failure can be safely ignored while fixing it without
 # blocking the LKGR finder on it.
-skipped_lkgr_bots = [
-    "Linux MSan",  # TODO(b/329130536): Re-enable
-]
+skipped_lkgr_bots = []
 
 # Use LUCI Scheduler BBv2 names and add Scheduler realms configs.
 lucicfg.enable_experiment("crbug.com/1182002")
@@ -762,7 +760,7 @@
 ci_builder("Linux Asan", "Linux|x64|asan")
 try_builder("linux_asan")
 ci_builder("Linux MSan", "Linux|x64|msan")
-try_builder("linux_msan", cq = None)  # TODO(b/329130536): Re-enable
+try_builder("linux_msan")
 ci_builder("Linux Tsan v2", "Linux|x64|tsan")
 try_builder("linux_tsan2")
 ci_builder("Linux UBSan", "Linux|x64|ubsan")
diff --git a/infra/config/cr-buildbucket.cfg b/infra/config/cr-buildbucket.cfg
index 3ab021a..039c580 100644
--- a/infra/config/cr-buildbucket.cfg
+++ b/infra/config/cr-buildbucket.cfg
@@ -1879,6 +1879,7 @@
         '          "Fuchsia Release",'
         '          "Linux (more configs)",'
         '          "Linux Asan",'
+        '          "Linux MSan",'
         '          "Linux Tsan v2",'
         '          "Linux UBSan",'
         '          "Linux UBSan vptr",'
diff --git a/infra/config/luci-notify.cfg b/infra/config/luci-notify.cfg
index eb9544a..129d0e4 100644
--- a/infra/config/luci-notify.cfg
+++ b/infra/config/luci-notify.cfg
@@ -295,6 +295,11 @@
     name: "Linux MSan"
     repository: "https://webrtc.googlesource.com/src"
   }
+  tree_closers {
+    tree_status_host: "webrtc-status.appspot.com"
+    failed_step_regexp: "bot_update|compile|gclient runhooks|runhooks|update|extract build|cleanup_temp|taskkill|compile|gn"
+    failed_step_regexp_exclude: ".*\\(experimental\\).*"
+  }
 }
 notifiers {
   notifications {