Add bisect config validation.

scripts/slave/recipe_modules/auto_bisect/example.expected/invalid_config.json

Index: scripts/slave/recipe_modules/auto_bisect/example.expected/invalid_config.json
diff --git a/scripts/slave/recipe_modules/auto_bisect/example.expected/invalid_config.json b/scripts/slave/recipe_modules/auto_bisect/example.expected/invalid_config.json
new file mode 100644
index 0000000000000000000000000000000000000000..5a89f410482238c127b968794bc40c8040d6e83f
--- /dev/null
+++ b/scripts/slave/recipe_modules/auto_bisect/example.expected/invalid_config.json
@@ -0,0 +1,66 @@
+[
+  {
+    "cmd": [
+      "git",
+      "update-ref",
+      "refs/heads/master",
+      "refs/remotes/origin/master"
+    ],
+    "cwd": "[TMP_BASE]/fake_checkout_tmp_1",
+    "name": "git update-ref"
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "master"
+    ],
+    "cwd": "[TMP_BASE]/fake_checkout_tmp_1",
+    "name": "git checkout"
+  },
+  {
+    "cmd": [],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "config",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@Bisect job configuration@{@@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"bad_revision\": \"314017\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"bug_id\": \"-1\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"builder_host\": \"master4.golo.chromium.org\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"builder_port\": \"8341\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"bypass_stats_check\": \"True\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"command\": \"src/tools/perf/run_benchmark -v --browser=release smoothness.tough_scrolling_cases\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"dummy_builds\": \"True\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"dummy_job_names\": \"True\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"good_revision\": \"not a valid revision\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"gs_bucket\": \"chrome-perf\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"max_time_minutes\": \"5\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"metric\": \"mean_input_event_latency/mean_input_event_latency\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"recipe_tester_name\": \"linux_perf_tester\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"repeat_count\": \"2\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"skip_gclient_ops\": \"True\", @@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@  \"test_type\": \"perf\"@@@",
+      "@@@STEP_LOG_LINE@Bisect job configuration@}@@@",
+      "@@@STEP_LOG_END@Bisect job configuration@@@",
+      "@@@SET_BUILD_PROPERTY@extra_result_code@[\"B4T_BAD_CONFIG\"]@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "import sys; sys.exit(1)"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "Recipe failed. Reason: Invalid value 'not a valid revision' for \"good_revision\".",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@import sys; sys.exit(1)@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "name": "$result",
+    "reason": "Invalid value 'not a valid revision' for \"good_revision\".",
+    "status_code": 1
+  }
+]