Added support for properly building and running isolates in recipes.

scripts/slave/recipes/gpu/build_and_test.expected/mac_release_tryserver.json

Index: scripts/slave/recipes/gpu/build_and_test.expected/mac_release_tryserver.json
diff --git a/scripts/slave/recipes/gpu/build_and_test.expected/mac_release_tryserver.json b/scripts/slave/recipes/gpu/build_and_test.expected/mac_release_tryserver.json
index d2e9e7356b6a5a663ec98871845b8dcb8d186654..1348e09db92785aa1e982da4ef3a848eb7b85e17 100644
--- a/scripts/slave/recipes/gpu/build_and_test.expected/mac_release_tryserver.json
+++ b/scripts/slave/recipes/gpu/build_and_test.expected/mac_release_tryserver.json
@@ -99,7 +99,7 @@
       "runhooks"
     ],
     "env": {
-      "GYP_DEFINES": "clang=1 component=static_library disable_glibcxx_debug=1 internal_gles2_conform_tests=1 target_arch=ia32",
+      "GYP_DEFINES": "clang=1 component=static_library disable_glibcxx_debug=1 internal_gles2_conform_tests=1 target_arch=ia32 test_isolation_mode=hashtable test_isolation_outdir=https://isolateserver.appspot.com",
       "GYP_GENERATORS": "ninja"
     },
     "name": "gclient runhooks"
@@ -199,9 +199,9 @@
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu/build_and_test\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu/build_and_test\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
-      "gl_tests"
+      "angle_unittests"
     ],
-    "name": "gl_tests"
+    "name": "angle_unittests"
   },
   {
     "always_run": true,
@@ -218,9 +218,14 @@
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu/build_and_test\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu/build_and_test\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
-      "angle_unittests"
+      "--run-python-script",
+      "[SLAVE_BUILD]/src/tools/swarming_client/run_isolated.py",
+      "-H",
+      "6e784864abbeeff7499c15f75b904851d633c187",
+      "-I",
+      "https://isolateserver.appspot.com"
     ],
-    "name": "angle_unittests"
+    "name": "gl_tests"
   },
   {
     "allow_subannotations": true,