Revert "build: roll infra_paths changes"

scripts/slave/recipes/webrtc/ios.expected/gn_build.json

Index: scripts/slave/recipes/webrtc/ios.expected/gn_build.json
diff --git a/scripts/slave/recipes/webrtc/ios.expected/gn_build.json b/scripts/slave/recipes/webrtc/ios.expected/gn_build.json
index cce6051937290ed8e2fb323abad3cc90cbc65ca9..aa0e1cbf1ba13995e7a7a5835520b4ac01b1cbe8 100644
--- a/scripts/slave/recipes/webrtc/ios.expected/gn_build.json
+++ b/scripts/slave/recipes/webrtc/ios.expected/gn_build.json
@@ -5,6 +5,7 @@
       "--json-file",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "host and tools info",
     "~followup_annotations": [
       "@@@STEP_TEXT@<br />OS X 1.2.3, Xcode 6.7.8 (5D342509a)@@@",
@@ -33,19 +34,20 @@
       "--slave",
       "fake-vm",
       "--spec",
-      "cache_dir = '[ROOT]/b/build/slave/cache_dir'\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/external/webrtc'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'webrtc-limited', 'url': 'https://chrome-internal.googlesource.com/chrome/deps/webrtc-limited'}]\ntarget_os = ['ios', 'mac']",
+      "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/external/webrtc'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'webrtc-limited', 'url': 'https://chrome-internal.googlesource.com/chrome/deps/webrtc-limited'}]\ntarget_os = ['ios', 'mac']",
       "--root",
       "src",
       "--revision_mapping_file",
       "{\"src\": \"got_revision\"}",
       "--git-cache-dir",
-      "[ROOT]/b/build/slave/cache_dir",
+      "[GIT_CACHE]",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "src@HEAD",
       "--output_manifest"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
@@ -63,9 +65,10 @@
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
-      "[CWD]/src/webrtc/build/ios/chromium.fake/ios.json",
+      "[SLAVE_BUILD]/src/webrtc/build/ios/chromium.fake/ios.json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "read build config",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -89,6 +92,7 @@
       "-e",
       "{\n  \"GYP_DEFINES\": {\n    \"OS\": \"ios\", \n    \"component\": \"static_library\"\n  }, \n  \"additional_compile_targets\": [\n    \"All\"\n  ], \n  \"compiler\": \"ninja\", \n  \"configuration\": \"Debug\", \n  \"env\": {}, \n  \"gn_args\": [\n    \"is_debug=true\"\n  ], \n  \"mb_type\": \"gn\", \n  \"sdk\": \"iphoneos8.0\", \n  \"tests\": [], \n  \"triggered bots\": {}, \n  \"use_analyze\": true, \n  \"xcode version\": \"fake xcode version\"\n}"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "finalize build config"
   },
   {
@@ -99,6 +103,7 @@
       "--version",
       "fake xcode version"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "find xcode",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
@@ -112,6 +117,7 @@
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_CROSSCOMPILE": "1",
@@ -127,6 +133,7 @@
   },
   {
     "cmd": [],
+    "cwd": "[SLAVE_BUILD]",
     "name": "ensure_goma"
   },
   {
@@ -137,16 +144,17 @@
       "--platform",
       "mac-amd64",
       "--dest-directory",
-      "[CWD]/cipd",
+      "[SLAVE_BUILD]/cipd",
       "--json-output",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "ensure_goma.install cipd",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_TEXT@cipd instance_id: 40-chars-fake-of-the-package-instance_id@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"executable\": \"fake_slave_build/cipd\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"executable\": \"[SLAVE_BUILD]/cipd/cipd\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"instance_id\": \"40-chars-fake-of-the-package-instance_id\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
@@ -154,10 +162,10 @@
   },
   {
     "cmd": [
-      "fake_slave_build/cipd",
+      "[SLAVE_BUILD]/cipd/cipd",
       "ensure",
       "--root",
-      "[ROOT]/b/build/slave/cache/cipd/goma",
+      "[CACHE]/cipd/goma",
       "--list",
       "infra_internal/goma/client/mac-amd64 release",
       "--json-output",
@@ -165,6 +173,7 @@
       "--service-account-json",
       "/creds/service_accounts/service-account-goma-client.json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "ensure_goma.ensure_installed",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
@@ -183,27 +192,28 @@
     "cmd": [
       "python",
       "-u",
-      "[CWD]/src/tools/mb/mb.py",
+      "[SLAVE_BUILD]/src/tools/mb/mb.py",
       "gen",
       "-m",
       "chromium.fake",
       "-b",
       "ios",
       "--config-file",
-      "[CWD]/src/webrtc/build/mb_config.pyl",
+      "[SLAVE_BUILD]/src/webrtc/build/mb_config.pyl",
       "--goma-dir",
-      "[ROOT]/b/build/slave/cache/cipd/goma",
+      "[CACHE]/cipd/goma",
       "//out/Debug-iphoneos"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "name": "generate_build_files"
   },
   {
     "cmd": [
       "ninja",
       "-C",
-      "[CWD]/src/out/Debug-iphoneos"
+      "[SLAVE_BUILD]/src/out/Debug-iphoneos"
     ],
-    "cwd": "[CWD]/src/out/Debug-iphoneos",
+    "cwd": "[SLAVE_BUILD]/src/out/Debug-iphoneos",
     "name": "compile"
   },
   {