Recipes: make cwd default to slave_build

scripts/slave/recipes/blink_downstream.expected/minimal_pass_continues.json

Index: scripts/slave/recipes/blink_downstream.expected/minimal_pass_continues.json
diff --git a/scripts/slave/recipes/blink_downstream.expected/minimal_pass_continues.json b/scripts/slave/recipes/blink_downstream.expected/minimal_pass_continues.json
index dc3d450cb2d67a5e9413da95d506d8bffe1c9e83..957da71efd5665761ba8e0516d304201150c7eda 100644
--- a/scripts/slave/recipes/blink_downstream.expected/minimal_pass_continues.json
+++ b/scripts/slave/recipes/blink_downstream.expected/minimal_pass_continues.json
@@ -26,6 +26,7 @@
       "src/v8@20123",
       "--force"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -72,6 +73,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "component=static_library gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
     },
@@ -95,6 +97,7 @@
       "--",
       "blink_tests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "compile"
   },
   {
@@ -114,6 +117,7 @@
       "--build-number=571",
       "webkit_unit_tests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "webkit_unit_tests"
   },
   {
@@ -149,6 +153,7 @@
       "V8-Blink Linux 64",
       "--no-pixel-tests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "webkit_tests (with patch)",
     "~followup_annotations": [
       "step returned non-zero exit code: 5",
@@ -176,6 +181,7 @@
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"V8-Blink Linux 64\", \"buildnumber\": 571, \"mastername\": \"client.v8\", \"recipe\": \"blink_downstream\", \"revision\": \"20123\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "archive_webkit_tests_results",
     "~followup_annotations": [
       "@@@STEP_LINK@layout_test_results@https://storage.googleapis.com/chromium-layout-test-archives/V8-Blink_Linux_64/571/layout-test-results/results.html@@@",
@@ -207,6 +213,7 @@
       "src/third_party/WebKit@5e2293dffc3cd07d37fbedea3b500f0eb650614d",
       "--force"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update (2)",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -241,6 +248,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "component=static_library gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
     },
@@ -264,6 +272,7 @@
       "--",
       "blink_tests"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "compile (2)"
   },
   {
@@ -303,6 +312,7 @@
       "--skipped",
       "always"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "webkit_tests (without patch)",
     "~followup_annotations": [
       "@@@STEP_TEXT@<br/>Total executed: 9001<br/>@@@"
@@ -315,6 +325,7 @@
       "\nimport sys, json\nfailures = json.load(open(sys.argv[1], 'rb'))\n\nsuccess = True\n\nif failures['new']:\n  success = False\n  print 'New failures:'\n  for f in failures['new']:\n    print f\n\nif failures['ignored']:\n  print 'Ignored failures:'\n  for f in failures['ignored']:\n    print f\n\nsys.exit(0 if success else 1)\n",
       "{\"ignored\": [], \"new\": [\"bad/totally-bad-probably.html\", \"tricky/totally-maybe-not-awesome.html\"]}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "webkit_tests",
     "~followup_annotations": [
       "@@@STEP_TEXT@<br/>failures:<br/>bad/totally-bad-probably.html<br/>tricky/totally-maybe-not-awesome.html<br/>@@@",