build: roll infra_paths changes

scripts/slave/recipes/dart/dart2js.expected/dart2js-win7-ie10-dev.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]\\resources\\bot_update.py",
       "--master",
       "client.dart",
       "--builder",
       "dart2js-win7-ie10-dev",
       "--slave",
       "TestSlavename",
       "--spec",
-      "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': 'DEPS', 'managed': False, 'name': 'sdk', 'url': 'https://chromium.googlesource.com/external/github.com/dart-lang/sdk.git'}]",
+      "cache_dir = '[ROOT]\\\\b\\\\build\\\\slave\\\\cache_dir'\nsolutions = [{'deps_file': 'DEPS', 'managed': False, 'name': 'sdk', 'url': 'https://chromium.googlesource.com/external/github.com/dart-lang/sdk.git'}]",
       "--root",
       "sdk",
       "--revision_mapping_file",
       "{}",
       "--git-cache-dir",
-      "[GIT_CACHE]",
+      "[ROOT]\\b\\build\\slave\\cache_dir",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "sdk@HEAD",
       "--force",
       "--output_manifest"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s;RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"sdk\": \"HEAD\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"manifest\": {}, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"sdk\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"properties\": {}, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"root\": \"sdk\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]\\gclient.py",
       "runhooks"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s;RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\sdk\\tools\\task_kill.py",
+      "[CWD]\\sdk\\tools\\task_kill.py",
       "--kill_browsers=True"
     ],
-    "cwd": "[SLAVE_BUILD]\\sdk",
+    "cwd": "[CWD]\\sdk",
     "name": "taskkill before building"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\sdk\\tools\\build.py",
+      "[CWD]\\sdk\\tools\\build.py",
       "-mrelease",
       "--arch=ia32",
       "dart2js_bot"
     ],
-    "cwd": "[SLAVE_BUILD]\\sdk",
+    "cwd": "[CWD]\\sdk",
     "name": "build dart"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\sdk\\tools\\test.py",
+      "[CWD]\\sdk\\tools\\test.py",
       "--mode=release",
       "--arch=ia32",
       "--compiler=dart2js",
       "--dart2js-batch",
       "--runtime=ie10",
       "--progress=buildbot",
       "-v",
       "--clear_browser_cache",
       "--report",
       "--time",
       "--failure-summary",
       "--write-debug-log",
       "--write-test-outcome-log",
       "--copy-coredumps",
       "--builder-tag=windows-ie10",
       "html",
       "pkg",
       "samples",
       "co19"
     ],
-    "cwd": "[SLAVE_BUILD]\\sdk",
+    "cwd": "[CWD]\\sdk",
     "name": "dart2js ie10 tests"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\sdk\\tools\\task_kill.py",
+      "[CWD]\\sdk\\tools\\task_kill.py",
       "--kill_browsers=True"
     ],
-    "cwd": "[SLAVE_BUILD]\\sdk",
+    "cwd": "[CWD]\\sdk",
     "name": "taskkill after testing"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]