Revert "build: roll infra_paths changes"

scripts/slave/recipes/skia/recreate_skps.expected/RecreateSKPs_dryrun.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "config",
       "--spec",
-      "cache_dir = '[ROOT]/b/build/slave/cache_dir'\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]"
+      "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient setup"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "sync",
       "--nohooks",
       "--force",
       "--verbose",
       "--delete_unversioned_trees",
       "--output-json",
       "/path/to/tmp/json"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient sync",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"solutions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"skia/\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"revision\": 164710@@@",
       "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"src/\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"revision\": 170242@@@",
       "@@@STEP_LOG_LINE@json.output@    }@@@",
       "@@@STEP_LOG_LINE@json.output@  }@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@",
       "@@@SET_BUILD_PROPERTY@got_revision@164710@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
+    "cwd": "[SLAVE_BUILD]",
     "env": {
       "CPPFLAGS": "-DSK_ALLOW_CROSSPROCESS_PICTUREIMAGEFILTERS=1",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "build/gyp_chromium"
     ],
-    "cwd": "[CWD]/src",
+    "cwd": "[SLAVE_BUILD]/src",
     "env": {
       "CPPFLAGS": "-DSK_ALLOW_CROSSPROCESS_PICTUREIMAGEFILTERS=1",
       "GYP_GENERATORS": "ninja"
     },
     "name": "gyp_chromium"
   },
   {
     "cmd": [
       "ninja",
       "-C",
       "out/Release",
       "chrome"
     ],
-    "cwd": "[CWD]/src",
+    "cwd": "[SLAVE_BUILD]/src",
     "name": "Build Chrome"
   },
   {
     "cmd": [
       "python",
-      "[ROOT]/b/build/scripts/slave/skia/recreate_skps.py",
-      "[CWD]/src",
-      "[CWD]/src/out/Release/chrome",
+      "[BUILD]/scripts/slave/skia/recreate_skps.py",
+      "[SLAVE_BUILD]/src",
+      "[SLAVE_BUILD]/src/out/Release/chrome",
       "--dry-run"
     ],
-    "cwd": "[CWD]/skia",
+    "cwd": "[SLAVE_BUILD]/skia",
     "name": "Recreate SKPs"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]