demo of step.context bot_update issue

scripts/slave/recipes/blink_downstream.expected/full_client_v8_fyi_V8_Blink_Win_pass.json

Index: scripts/slave/recipes/blink_downstream.expected/full_client_v8_fyi_V8_Blink_Win_pass.json
diff --git a/scripts/slave/recipes/blink_downstream.expected/full_client_v8_fyi_V8_Blink_Win_pass.json b/scripts/slave/recipes/blink_downstream.expected/full_client_v8_fyi_V8_Blink_Win_pass.json
index 945e0310cf729d88bc1049eeaa32492c66d8f58b..2595328d48ec624ae9c5257f29172f8d155588d4 100644
--- a/scripts/slave/recipes/blink_downstream.expected/full_client_v8_fyi_V8_Blink_Win_pass.json
+++ b/scripts/slave/recipes/blink_downstream.expected/full_client_v8_fyi_V8_Blink_Win_pass.json
@@ -194,7 +194,7 @@
       "RECIPE_PACKAGE_REPO[depot_tools]\\gclient.py",
       "runhooks"
     ],
-    "cwd": "[BUILDER_CACHE]\\V8_Blink_Win\\src",
+    "cwd": "[SLAVE_BUILD]\\src",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json",
       "GYP_CHROMIUM_NO_ACTION": "1",
@@ -207,19 +207,19 @@
     "cmd": [
       "python",
       "-u",
-      "[BUILDER_CACHE]\\V8_Blink_Win\\src\\tools\\mb\\mb.py",
+      "[SLAVE_BUILD]\\src\\tools\\mb\\mb.py",
       "gen",
       "-m",
       "client.v8.fyi",
       "-b",
       "V8-Blink Win",
       "--config-file",
-      "[BUILDER_CACHE]\\V8_Blink_Win\\src\\tools\\mb\\mb_config.pyl",
+      "[SLAVE_BUILD]\\src\\tools\\mb\\mb_config.pyl",
       "--goma-dir",
       "[CACHE]\\cipd\\goma",
       "//out/Release"
     ],
-    "cwd": "[BUILDER_CACHE]\\V8_Blink_Win\\src",
+    "cwd": "[SLAVE_BUILD]\\src",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
     },
@@ -240,7 +240,7 @@
       "--target",
       "Release",
       "--src-dir",
-      "[BUILDER_CACHE]\\V8_Blink_Win\\src",
+      "[SLAVE_BUILD]\\src",
       "--goma-cache-dir",
       "[GOMA_CACHE]",
       "--goma-deps-cache-dir",
@@ -290,13 +290,13 @@
     "cmd": [
       "python",
       "-u",
-      "[BUILDER_CACHE]\\V8_Blink_Win\\src\\third_party\\WebKit\\Tools\\Scripts\\run-webkit-tests",
+      "[SLAVE_BUILD]\\src\\third_party\\WebKit\\Tools\\Scripts\\run-webkit-tests",
       "--target",
       "Release",
       "--results-directory",
       "[SLAVE_BUILD]\\layout-test-results",
       "--build-dir",
-      "[BUILDER_CACHE]\\V8_Blink_Win\\src\\out",
+      "[SLAVE_BUILD]\\src\\out",
       "--json-test-results",
       "/path/to/tmp/json",
       "--test-results-server",
@@ -309,7 +309,7 @@
       "webkit_tests (with patch)",
       "--no-pixel-tests",
       "--additional-expectations",
-      "[BUILDER_CACHE]\\V8_Blink_Win\\src\\v8\\tools\\blink_tests\\TestExpectations",
+      "[SLAVE_BUILD]\\src\\v8\\tools\\blink_tests\\TestExpectations",
       "--master-name",
       "client.v8.fyi",
       "--debug-rwt-logging"
@@ -328,7 +328,7 @@
       "--results-dir",
       "[SLAVE_BUILD]\\layout-test-results",
       "--build-dir",
-      "[BUILDER_CACHE]\\V8_Blink_Win\\src\\out",
+      "[SLAVE_BUILD]\\src\\out",
       "--build-number",
       "571",
       "--builder-name",