Enable post-compile test isolation for all CI builders.

scripts/slave/recipes/chromium.expected/full_client_skia_Mac_Builder.json

Index: scripts/slave/recipes/chromium.expected/full_client_skia_Mac_Builder.json
diff --git a/scripts/slave/recipes/chromium.expected/full_client_skia_Mac_Builder.json b/scripts/slave/recipes/chromium.expected/full_client_skia_Mac_Builder.json
index 4459cc50006c2e75432c11e41683f52de7ac9b78..1461c308d060f065dc9cd8e344910b9403f38472 100644
--- a/scripts/slave/recipes/chromium.expected/full_client_skia_Mac_Builder.json
+++ b/scripts/slave/recipes/chromium.expected/full_client_skia_Mac_Builder.json
@@ -99,7 +99,7 @@
       "runhooks"
     ],
     "env": {
-      "GYP_DEFINES": "clang=1 component=static_library gomadir='[BUILD]/goma' target_arch=ia32 test_isolation_mode=archive test_isolation_outdir=https://isolateserver.appspot.com use_goma=1"
+      "GYP_DEFINES": "clang=1 component=static_library gomadir='[BUILD]/goma' target_arch=ia32 test_isolation_mode=prepare use_goma=1"
     },
     "name": "gclient runhooks"
   },
@@ -206,13 +206,16 @@
     "cmd": [
       "python",
       "-u",
-      "[BUILD]/scripts/slave/recipe_modules/isolate/resources/find_isolated_tests.py",
-      "--build-dir",
-      "[SLAVE_BUILD]/src/out/Release",
-      "--output-json",
-      "/path/to/tmp/json"
+      "[SLAVE_BUILD]/src/tools/swarming_client/isolate.py",
+      "batcharchive",
+      "--dump-json",
+      "/path/to/tmp/json",
+      "--isolate-server",
+      "https://isolateserver.appspot.com",
+      "--verbose",
+      "[SLAVE_BUILD]/src/out/Release/browser_tests.isolated.gen.json"
     ],
-    "name": "find isolated tests",
+    "name": "isolate tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"browser_tests\": \"[dummy hash for browser_tests]\"@@@",