Add tree closing configs for chromium.memory builders.

Bug: 1094768
Change-Id: Ib692acc66b8446cc2606551507caf01b6c7bc313
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2289271
Commit-Queue: Owen Rodley <orodley@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Auto-Submit: Owen Rodley <orodley@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786611}

infra/config/lib/ci.star

@@ -868,6 +868,7 @@ def memory_builder(
     name,
     goma_jobs=builders.goma.jobs.MANY_JOBS_FOR_CI,
     notifies=None,
+    tree_closing=True,
     **kwargs):
   if name.startswith('Linux'):
     notifies = (notifies or []) + ['linux-memory']
@@ -878,6 +879,7 @@ def memory_builder(
       goma_jobs = goma_jobs,
       mastername = 'chromium.memory',
       notifies = notifies,
+      tree_closing=tree_closing,
       **kwargs
   )
 

infra/config/subprojects/chromium/master-only/ci.star

@@ -2889,6 +2889,7 @@ ci.memory_builder(
     # TODO(https://crbug.com/919430) Remove the larger timeout once compile
     # times have been brought down to reasonable level
     execution_timeout = time.hour * 9 / 2,  # 4.5 (can't multiply float * duration)
+    tree_closing = False,
 )
 
 ci.memory_builder(
@@ -3028,6 +3029,7 @@ ci.memory_builder(
         short_name = 'asn',
     ),
     main_console_view = 'main',
+    tree_closing = False,
 )
 
 ci.memory_builder(