Use remove_build_metadata.py on all the trybots.

scripts/slave/recipes/chromium_trybot.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 DEPS = [
   'bot_update',
   'chromium',
   'chromium_tests',
   'gclient',
   'isolate',
@@ skipping 877 matching lines @@
 
         # TODO(phajdan.jr): Set failed tryjob result after recognizing infra
         # compile failures. We've seen cases of compile with patch failing
         # with build steps getting killed, compile without patch succeeding,
         # and compile with patch succeeding on another attempt with same patch.
       except api.step.StepFailure:
         api.tryserver.set_transient_failure_tryjob_result()
         raise
       raise
 
-    # Collect *.isolated hashes for all isolated targets, used when triggering
-    # tests on swarming.
     if bot_config.get('use_isolate') or has_swarming_tests:
+      # Remove the build metadata from the binaries. Currently it's a noop on
+      # all platforms except Windows where it run zap_timestamp.exe on all the
+      # PE images.
+      api.isolate.remove_build_metadata()
+      # Collect *.isolated hashes for all isolated targets, used when triggering
+      # tests on swarming.
       api.isolate.find_isolated_tests(api.chromium.output_dir)
 
     if bot_config['compile_only']:
       tests = []
 
     return tests, bot_update_step
 
   mastername = api.properties.get('mastername')
   buildername = api.properties.get('buildername')
   bot_config = get_bot_config(mastername, buildername)
@@ skipping 679 matching lines @@
             'test': 'base_tests',
             'args': ['--gtest-filter: *NaCl*.*'],
           },
         ],
       })
     ) +
     api.override_step_data(
       'analyze',
       api.json.output({'invalid_targets': 'invalid target'}))
   )