Recipes: make cwd default to slave_build

scripts/slave/recipes/android/perf.expected/provision_devices.json

Index: scripts/slave/recipes/android/perf.expected/provision_devices.json
diff --git a/scripts/slave/recipes/android/perf.expected/provision_devices.json b/scripts/slave/recipes/android/perf.expected/provision_devices.json
index c520bb9359853007517c4696f3ed97ce840c25e6..d8e375ad49139cb146dc0fe608b451b949535a16 100644
--- a/scripts/slave/recipes/android/perf.expected/provision_devices.json
+++ b/scripts/slave/recipes/android/perf.expected/provision_devices.json
@@ -21,6 +21,7 @@
       "--revision",
       "src@deadbeef"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
@@ -68,6 +69,7 @@
       "[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@@@",
@@ -90,6 +92,7 @@
       "--properties",
       "{\"buildername\": \"Android Nexus5 Perf\", \"buildnumber\": 571, \"mastername\": \"chromium.perf\", \"perf-id\": \"android-nexus5\", \"results-url\": \"https://chromeperf.appspot.com\", \"slavename\": \"slavename\", \"target_platform\": \"android\"}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
@@ -106,6 +109,7 @@
       "[SLAVE_BUILD]/src/out/build_product.zip",
       "[SLAVE_BUILD]/src"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "clean local files",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -137,6 +141,7 @@
       "gs://chrome-perf/android_perf_rel/full-build-linux_deadbeef.zip",
       "[SLAVE_BUILD]/src/out/build_product.zip"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "gsutil download_build_product"
   },
   {
@@ -155,6 +160,7 @@
       "[SLAVE_BUILD]/src/build/android/adb_logcat_monitor.py",
       "[SLAVE_BUILD]/src/out/logcat"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
@@ -168,6 +174,7 @@
       "--adb-path",
       "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools/adb"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
@@ -179,6 +186,7 @@
       "--json-output",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
@@ -223,6 +231,7 @@
       "--disable-network",
       "--disable-java-debug"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },