Enable post-compile test isolation for all CI builders.

scripts/slave/recipe_modules/chromium_tests/api.py

 # Copyright 2014 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.
 
 import copy
 
 from slave import recipe_api
 
 
 # Different types of builds this recipe module can do.
@@ skipping 122 matching lines @@
     recipe_config = RECIPE_CONFIGS[recipe_config_name]
 
     self.m.chromium.set_config(
         recipe_config['chromium_config'],
         **bot_config.get('chromium_config_kwargs', {}))
     # Set GYP_DEFINES explicitly because chromium config constructor does
     # not support that.
     self.m.chromium.c.gyp_env.GYP_DEFINES.update(
         bot_config.get('GYP_DEFINES', {}))
     if bot_config.get('use_isolate'):
-      self.m.isolate.set_isolate_environment(
-          self.m.chromium.c, mode=bot_config.get('isolation_mode', 'archive'))
+      self.m.isolate.set_isolate_environment(self.m.chromium.c, mode='prepare')
     for c in recipe_config.get('chromium_apply_config', []):
       self.m.chromium.apply_config(c)
     for c in bot_config.get('chromium_apply_config', []):
       self.m.chromium.apply_config(c)
     if chromium_apply_config:
       for c in chromium_apply_config:
         self.m.chromium.apply_config(c)
     self.m.gclient.set_config(
         recipe_config['gclient_config'],
         **bot_config.get('gclient_config_kwargs', {}))
@@ skipping 31 matching lines @@
     # Bot Update re-uses the gclient configs.
     update_step = self.m.bot_update.ensure_checkout()
     assert update_step.json.output['did_run']
     # HACK(dnj): Remove after 'crbug.com/398105' has landed
     self.m.chromium.set_build_properties(update_step.json.output['properties'])
 
     if not enable_swarming:
       enable_swarming = bot_config.get('enable_swarming')
 
     if enable_swarming:
-      self.m.isolate.set_isolate_environment(
-          self.m.chromium.c, mode=bot_config.get('isolation_mode', 'archive'))
+      self.m.isolate.set_isolate_environment(self.m.chromium.c, mode='prepare')
       self.m.swarming.check_client_version()
       self.m.swarming.default_priority = 50
       os_dimension = bot_config.get('swarming_dimensions', {}).get('os')
       if os_dimension:
         self.m.swarming.set_default_dimension('os', os_dimension)
       cpu_dimension = bot_config.get('swarming_dimensions', {}).get('cpu')
       if cpu_dimension:
         self.m.swarming.set_default_dimension('cpu', cpu_dimension)
 
     if not bot_config.get('disable_runhooks'):
@@ skipping 127 matching lines @@
 
       # Step 'checkdeps' is same on all platforms, no need to run it everywhere.
       if self.m.platform.is_linux:
         self.m.chromium.checkdeps()
 
       if self.m.chromium.c.TARGET_PLATFORM == 'android':
         self.m.chromium_android.check_webview_licenses()
         self.m.chromium_android.findbugs()
 
       if isolated_targets:
-        isolation_mode = bot_config.get('isolation_mode', 'archive')
-        deduped_targets = list(set(isolated_targets))
-        # In 'archive' mode, 'compile' step does the archival, and we just need
-        # to find resulting *.isolated files.
-        if isolation_mode == 'archive':
-          self.m.isolate.find_isolated_tests(
-              self.m.chromium.output_dir, targets=deduped_targets)
-        else:
-          # In 'prepare' mode, 'compile' just prepares all information needed
-          # for isolation, and isolation is a separate step done here.
-          assert isolation_mode == 'prepare', isolation_mode
-          self.m.isolate.isolate_tests(
-              self.m.chromium.output_dir, targets=deduped_targets)
+        # In 'prepare' isolation mode, 'compile' just prepares all information
+        # needed for the isolation, and the isolation is a separate step.
+        self.m.isolate.isolate_tests(
+            self.m.chromium.output_dir,
+            targets=list(set(isolated_targets)),
+            verbose=True)
 
     got_revision = update_step.presentation.properties['got_revision']
 
     if bot_type == 'builder':
       if mastername == 'chromium.linux':
         # TODO(samuong): This is restricted to Linux for now until I have more
         # confidence that it is not totally broken.
         self.m.archive.archive_dependencies(
             'archive dependencies',
             self.m.chromium.c.build_config_fs,
@@ skipping 174 matching lines @@
     if mastername == 'chromium.perf':
       return self.m.archive.legacy_upload_url(
           master_config.get('build_gs_bucket'),
           extra_url_components=None)
     elif mastername == 'tryserver.chromium.perf':
       return  None
     else:
       return self.m.archive.legacy_upload_url(
           master_config.get('build_gs_bucket'),
           extra_url_components=self.m.properties['mastername'])