Added support for properly building and running isolates in recipes.

scripts/slave/recipes/gpu/build_and_test.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.
 
 # This recipe is intended to control all of the GPU related bots:
 #   chromium.gpu
 #   chromium.gpu.fyi
 #   The GPU bots on the chromium.webkit waterfall
 #   The GPU bots on the tryserver.chromium waterfall
 
@@ skipping 71 matching lines @@
   # Test one configuration skipping the checkout.
   yield (
     api.test('mac_release_skip_checkout') +
     api.properties.git_scheduled(build_config='Release', skip_checkout=True) +
     api.platform.name('mac')
   )
 
   # Test one configuration skipping the compile.
   yield (
     api.test('mac_release_skip_compile') +
-    api.properties.git_scheduled(build_config='Release', skip_compile=True) +
+    api.properties.git_scheduled(
+      build_config='Release',
+      skip_compile=True,
+      # These would ordinarily be generated during the build step.
+      swarm_hashes=dict(
+        gl_tests='6e784864abbeeff7499c15f75b904851d633c187')) +
     api.platform.name('mac')
   )
 
   # Bail when apply_issue fails
   yield (
     api.test('bail_on_bad_patch') +
     api.properties.tryserver(
         build_config='Release',
         root='src/third_party/WebKit') +
     api.platform.name('mac') +
     api.step_data('apply_issue', retcode=1)
   )