WebRTC: Enable bot_update for standalone recipe.

scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_linux.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "tryserver.webrtc",
       "--builder",
       "linux",
       "--slave",
       "slavename",
       "--spec",
       "cache_dir = None\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'svn://svn-mirror.golo.chromium.org/webrtc/trunk'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'webrtc-limited', 'url': 'svn://svn-mirror.golo.chromium.org/chrome-internal/trunk/webrtc-limited'}]",
       "--revision_mapping_file",
       "{\"src\": \"got_revision\"}",
       "--issue",
       "666666",
       "--patchset",
       "1",
       "--rietveld_server",
       "https://fake.rietveld.url",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "src@12345"
     ],
     "name": "bot_update",
     "~followup_annotations": [
+      "@@@STEP_TEXT@Some step text@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"did_run\": false, @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"src\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"properties\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_revision\": 170242, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_revision_cp\": \"refs/heads/master@{#170242}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_revision_git\": \"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"root\": \"src\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@170242@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#170242}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision_git@\"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\"@@@"
     ]
   },
   {
-    "cmd": [
-      "python",
-      "-u",
-      "[DEPOT_TOOLS]/gclient.py",
-      "config",
-      "--spec",
-      "cache_dir = None\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'svn://svn-mirror.golo.chromium.org/webrtc/trunk'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'webrtc-limited', 'url': 'svn://svn-mirror.golo.chromium.org/chrome-internal/trunk/webrtc-limited'}]"
-    ],
-    "name": "gclient setup"
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "[BUILD]/scripts/slave/gclient_safe_revert.py",
-      ".",
-      "[DEPOT_TOOLS]/gclient"
-    ],
-    "name": "gclient revert"
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "[DEPOT_TOOLS]/gclient.py",
-      "sync",
-      "--nohooks",
-      "--force",
-      "--verbose",
-      "--delete_unversioned_trees",
-      "--revision",
-      "src@12345",
-      "--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@    \"src/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 170242@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"webrtc-limited/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 24644@@@",
-      "@@@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@170242@@@"
-    ]
-  },
-  {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/apply_issue.py",
       "-r",
       "[SLAVE_BUILD]/src",
       "-i",
       "666666",
       "-p",
       "1",
@@ skipping 376 matching lines @@
       "{\"BUILD_CONFIG\": \"Debug\", \"buildername\": \"linux\", \"issue\": 666666, \"mastername\": \"tryserver.webrtc\", \"patchset\": 1, \"recipe\": \"webrtc/standalone\", \"revision\": \"12345\", \"rietveld\": \"https://fake.rietveld.url\", \"slavename\": \"slavename\"}",
       "--annotate=gtest",
       "--test-type=voice_engine_unittests",
       "--builder-name=linux",
       "--slave-name=slavename",
       "voice_engine_unittests"
     ],
     "name": "voice_engine_unittests"
   }
 ]