Reland "Skia: Maintain a checkout on swarming (compile) bots"

scripts/slave/recipes/skia/ct_skps.py

 # Copyright 2015 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.
 
 from common.skia import global_constants
 
 
 DEPS = [
   'ct',
   'file',
@@ skipping 74 matching lines @@
                    'origin/master')
   gclient_cfg.got_revision_mapping['skia'] = 'got_revision'
 
   src = gclient_cfg.solutions.add()
   src.name = 'src'
   src.managed = False
   src.url = 'https://chromium.googlesource.com/chromium/src.git'
   src.revision = 'origin/master'  # Always checkout Chromium at ToT.
 
   for repo in (skia, src):
-    api.skia.update_repo(repo)
+    api.skia.update_repo(api.path['slave_build'], repo)
 
   update_step = api.gclient.checkout(gclient_config=gclient_cfg)
   skia_hash = update_step.presentation.properties['got_revision']
 
   # Checkout Swarming scripts.
   # Explicitly set revision to empty string to checkout swarming ToT. If this is
   # not done then it crashes due to missing
   # api.properties['parent_got_swarming_client_revision'] which seems to be
   # set only for Chromium bots.
   api.swarming_client.checkout(revision='')
@@ skipping 198 matching lines @@
 
   yield(
     api.test('CT_IMG_DECODE_10k_SKPs_Trybot') +
     api.properties(
         buildername='Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-CT_IMG_DECODE_'
                     '10k_SKPs_Trybot',
         ct_num_slaves=ct_num_slaves,
         revision=skia_revision,
     )
   )