Recipes: make cwd default to slave_build

scripts/slave/recipes/chromium.expected/full_chromium_perf_Mac_10_8_Perf__3_.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_perf_Mac_10_8_Perf__3_.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_perf_Mac_10_8_Perf__3_.json b/scripts/slave/recipes/chromium.expected/full_chromium_perf_Mac_10_8_Perf__3_.json
index 6e5b52e3832f6aa9b94c8f7d8c3eb1437a606bfb..39b04be219be095adff037071f192a95b8c53dd4 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_perf_Mac_10_8_Perf__3_.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_perf_Mac_10_8_Perf__3_.json
@@ -21,6 +21,7 @@
       "--revision",
       "src@1111111"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -67,6 +68,7 @@
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_DEFINES": "branding=Chrome buildtype=Official clang=1 component=static_library gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
     },
@@ -80,6 +82,7 @@
       "[SLAVE_BUILD]/src/testing/buildbot/chromium.perf.json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "read test spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: [SLAVE_BUILD]/src/testing/buildbot/chromium.perf.json@@@",
@@ -102,6 +105,7 @@
       "--properties",
       "{\"buildername\": \"Mac 10.8 Perf (3)\", \"buildnumber\": 571, \"mastername\": \"chromium.perf\", \"perf-id\": \"chromium-rel-mac8\", \"results-url\": \"https://chromeperf.appspot.com\", \"slavename\": \"TestSlavename\", \"target_platform\": \"mac\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
@@ -114,6 +118,7 @@
       "-u",
       "[BUILD]/scripts/slave/cleanup_temp.py"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
@@ -123,6 +128,7 @@
       "\nimport os, sys\nfrom common import chromium_utils\n\nif os.path.exists(sys.argv[1]):\n  chromium_utils.RemoveDirectory(sys.argv[1])\n",
       "[SLAVE_BUILD]/src/out/Release"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "rmtree build directory",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -148,6 +154,7 @@
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"Mac 10.8 Perf (3)\", \"buildnumber\": 571, \"mastername\": \"chromium.perf\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Mac Builder\", \"parent_got_revision\": \"1111111\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "extract build"
   },
   {
@@ -163,6 +170,7 @@
       "--num-shards",
       "5"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "List Perf Tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",