[libfuzzer] registering ubsan build.

masters/master.chromium.fyi/master.cfg

Index: masters/master.chromium.fyi/master.cfg
diff --git a/masters/master.chromium.fyi/master.cfg b/masters/master.chromium.fyi/master.cfg
index c1f8e2bc10953bdeb17c4656a6acadee00ec22b3..559a489a29e335aac672606053b64128a57922cc 100644
--- a/masters/master.chromium.fyi/master.cfg
+++ b/masters/master.chromium.fyi/master.cfg
@@ -142,6 +142,7 @@ s_chromium = Scheduler(
                   'Chromium Win 10',
                   'Libfuzzer Upload Linux ASan',
                   'Libfuzzer Upload Linux MSan',
+                  'Libfuzzer Upload Linux UBSan',
                   'MD Top Chrome ChromeOS non-material',
                   'MD Top Chrome ChromeOS material-hybrid',
                   'MD Top Chrome Win material',
@@ -1233,6 +1234,14 @@ b_chromium_libfuzzer_upload_linux_msan = {
   'auto_reboot': True,
 }
 
+b_chromium_libfuzzer_upload_linux_ubsan = {
+  'name': 'Libfuzzer Upload Linux UBSan',
+  'factory': m_annotator.BaseFactory('chromium_libfuzzer',
+                                     timeout=24000),
+  'category': 'chromium_libfuzzer',
+  'auto_reboot': True,
+}
+
 def windows_browser_drmemory_light_tester(shard, total):
   if shard < 1 or shard > total:
     raise
@@ -1316,6 +1325,7 @@ c['builders'] = [
   b_blink_linux_lsan_asan,
   b_chromium_libfuzzer_upload_linux_asan,
   b_chromium_libfuzzer_upload_linux_msan,
+  b_chromium_libfuzzer_upload_linux_ubsan,
 
   # MiniInstaller
   b_chromium_win_mini_installer,