CrOS: Switch tryserver over to recipes, Gitiles.

scripts/slave/recipes/cros/cbuildbot_tryjob.expected/unknown_config.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[gitiles]/resources/gerrit_client.py",
       "--json-file",
       "/path/to/tmp/json",
       "--url",
       "https://chromium.googlesource.com/chromiumos/tryjobs.git/+/a94a8fe5ccb19ba61c4c0873d391e987982fbbd3?format=json",
@@ skipping 41 matching lines @@
       "[BUILD]/scripts/tools/pycurl.py",
       "https://chromium.googlesource.com/chromiumos/tryjobs.git/+/a94a8fe5ccb19ba61c4c0873d391e987982fbbd3/user/user.12345?format=text",
       "--outfile",
       "/path/to/tmp/",
       "--attempts",
       "10"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "Fetch tryjob descriptor (user/user.12345)",
     "~followup_annotations": [
-      "@@@STEP_TEXT@extra_args: [u'--timeout', u'14400', u'--remote-trybot', u'--remote-version=4']<br/>name: 12345<br/>email: testauthor@fake.chromium.org@@@"
+      "@@@STEP_LOG_LINE@tryjob.json@@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@{@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@  \"name\": \"12345\",@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@  \"email\": \"testauthor@fake.chromium.org\",@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@  \"extra_args\": [@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@    \"--timeout\",@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@    \"14400\",@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@    \"--remote-trybot\",@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@    \"--remote-version=4\"@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@  ]@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@}@@@",
+      "@@@STEP_LOG_LINE@tryjob.json@@@@",
+      "@@@STEP_LOG_END@tryjob.json@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "chromiumos.tryserver",
       "--builder",
@@ skipping 21 matching lines @@
       "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"chromite\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"properties\": {}, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"root\": \"chromite\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
+    "cmd": [
+      "git",
+      "checkout",
+      "master"
+    ],
+    "cwd": "[SLAVE_BUILD]/chromite",
+    "name": "checkout chromite branch [master]"
+  },
+  {
     "allow_subannotations": true,
     "cmd": [
       "[SLAVE_BUILD]/chromite/bin/cbuildbot",
       "--buildroot",
       "[ROOT]/cbuild/etc_master",
-      "--branch",
-      "master",
       "--clobber",
       "--timeout",
       "14400",
       "--remote-trybot",
       "--remote-version=4",
-      "etc"
+      "xxx-fakeboard-fakebuild"
     ],
-    "name": "cbuildbot [etc]"
+    "name": "cbuildbot [xxx-fakeboard-fakebuild]"
   }
 ]