Fix hack for test presentation in path api.

scripts/slave/recipes/polymer.expected/polymer-linux.json

 [
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "config",
       "--spec",
       "cache_dir = None\nsolutions = [{'deps_file': '', 'managed': True, 'name': 'polymer', 'url': 'https://github.com/Polymer/polymer.git'}, {'deps_file': '', 'managed': True, 'name': 'platform', 'url': 'https://github.com/Polymer/platform.git'}, {'deps_file': '', 'managed': True, 'name': 'WeakMap', 'url': 'https://github.com/Polymer/WeakMap.git'}, {'deps_file': '', 'managed': True, 'name': 'CustomElements', 'url': 'https://github.com/Polymer/CustomElements.git'}, {'deps_file': '', 'managed': True, 'name': 'ShadowDOM', 'url': 'https://github.com/Polymer/ShadowDOM.git'}, {'deps_file': '', 'managed': True, 'name': 'HTMLImports', 'url': 'https://github.com/Polymer/HTMLImports.git'}, {'deps_file': '', 'managed': True, 'name': 'observe-js', 'url': 'https://github.com/Polymer/observe-js.git'}, {'deps_file': '', 'managed': True, 'name': 'NodeBind', 'url': 'https://github.com/Polymer/NodeBind.git'}, {'deps_file': '', 'managed': True, 'name': 'TemplateBinding', 'url': 'https://github.com/Polymer/TemplateBinding.git'}, {'deps_file': '', 'managed': True, 'name': 'polymer-expressions', 'url': 'https://github.com/Polymer/polymer-expressions.git'}, {'deps_file': '', 'managed': True, 'name': 'PointerGestures', 'url': 'https://github.com/Polymer/PointerGestures.git'}, {'deps_file': '', 'managed': True, 'name': 'PointerEvents', 'url': 'https://github.com/Polymer/PointerEvents.git'}, {'deps_file': '', 'managed': True, 'name': 'tools', 'url': 'https://github.com/Polymer/tools.git'}]"
     ],
     "name": "gclient setup",
     "seed_steps": [
       "gclient setup",
       "gclient revert",
       "gclient sync",
       "submodule update"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[BUILD_ROOT]/scripts/slave/gclient_safe_revert.py",
+      "[BUILD]/scripts/slave/gclient_safe_revert.py",
       ".",
-      "[DEPOT_TOOLS_ROOT]/gclient"
+      "[DEPOT_TOOLS]/gclient"
     ],
     "name": "gclient revert"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "sync",
       "--nohooks",
       "--output-json",
       "/path/to/tmp/json"
     ],
     "name": "gclient sync",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"solutions\": {}@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "recurse",
       "git",
       "submodule",
       "update",
       "--init",
       "--recursive"
     ],
     "name": "submodule update"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
-      "[SLAVE_BUILD_ROOT]/.tmp",
+      "[SLAVE_BUILD]/.tmp",
       "511"
     ],
     "name": "makedirs tmp",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
       "@@@STEP_LOG_LINE@python.inline@import sys, os@@@",
       "@@@STEP_LOG_LINE@python.inline@path = sys.argv[1]@@@",
       "@@@STEP_LOG_LINE@python.inline@mode = int(sys.argv[2])@@@",
       "@@@STEP_LOG_LINE@python.inline@if not os.path.isdir(path):@@@",
       "@@@STEP_LOG_LINE@python.inline@  if os.path.exists(path):@@@",
       "@@@STEP_LOG_LINE@python.inline@    print \"%s exists but is not a dir\" % path@@@",
       "@@@STEP_LOG_LINE@python.inline@    sys.exit(1)@@@",
       "@@@STEP_LOG_LINE@python.inline@  os.makedirs(path, mode)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
       "npm",
       "install",
       "--tmp",
-      "[SLAVE_BUILD_ROOT]/.tmp"
+      "[SLAVE_BUILD]/.tmp"
     ],
-    "cwd": "[SLAVE_BUILD_ROOT]/polymer",
+    "cwd": "[SLAVE_BUILD]/polymer",
     "name": "update-install"
   },
   {
     "allow_subannotations": true,
     "cmd": [
       "xvfb-run",
       "grunt",
       "test-buildbot"
     ],
-    "cwd": "[SLAVE_BUILD_ROOT]/polymer",
+    "cwd": "[SLAVE_BUILD]/polymer",
     "name": "test"
   }
 ]