Fix hack for test presentation in path api.

scripts/slave/recipes/chromium.expected/basic_linux_32.json

 [
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "config",
       "--spec",
       "cache_dir = '[ROOT]/git_cache'\nsolutions = [{'custom_deps': {'src/third_party/WebKit/LayoutTests': None, 'src/webkit/data/layout_tests/LayoutTests': None}, 'custom_vars': {'googlecode_url': 'svn://svn-mirror.golo.chromium.org/%s', 'nacl_trunk': 'svn://svn-mirror.golo.chromium.org/native_client/trunk', 'sourceforge_url': 'svn://svn-mirror.golo.chromium.org/%(repo)s', 'webkit_trunk': 'svn://svn-mirror.golo.chromium.org/blink/trunk'}, 'deps_file': '.DEPS.git', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}]"
     ],
     "name": "gclient setup",
     "seed_steps": [
       "gclient setup",
       "gclient sync",
       "gclient recurse (git config user.name)",
       "gclient recurse (git config user.email)",
       "gclient runhooks",
       "compile"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "sync",
       "--verbose",
       "--with_branch_heads",
       "--nohooks",
       "-j8",
       "--reset",
       "--delete_unversioned_trees",
       "--force",
       "--upstream",
       "--no-nag-max",
@@ skipping 30 matching lines @@
       "@@@SET_BUILD_PROPERTY@got_swarming_client_revision@\"a0ee5d99f1d4b38ddaa4c759c837980b63b99566\"@@@",
       "@@@SET_BUILD_PROPERTY@got_webrtc_revision@\"0f90628433546e61d9268596da93418c623137f4\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision@\"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\"@@@",
       "@@@SET_BUILD_PROPERTY@got_swarm_client_revision@\"932d037f462c12db1f3210de8ea1b2964f363f47\"@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "recurse",
       "git",
       "config",
       "user.name",
       "local_bot"
     ],
     "name": "gclient recurse (git config user.name)"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "recurse",
       "git",
       "config",
       "user.email",
       "local_bot@example.com"
     ],
     "name": "gclient recurse (git config user.email)"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS_ROOT]/gclient.py",
+      "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
     "env": {
       "GYP_DEFINES": "component=static_library",
       "GYP_GENERATORS": "ninja"
     },
     "name": "gclient runhooks"
   },
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
-      "[BUILD_ROOT]/scripts/slave/compile.py",
+      "[BUILD]/scripts/slave/compile.py",
       "--target",
       "Release",
       "--build-dir",
-      "[SLAVE_BUILD_ROOT]/src/out",
+      "[SLAVE_BUILD]/src/out",
       "--src-dir",
-      "[SLAVE_BUILD_ROOT]/src",
+      "[SLAVE_BUILD]/src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--",
       "All",
       "chromium_builder_tests"
     ],
     "name": "compile"
   },
   {
     "cmd": [
       "python",
       "-u",
       "print \"last step\""
     ],
     "name": "last step",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@print \"last step\"@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   }
 ]