Replace builder_host and builder_port with builder_type.

tools/auto_bisect/configs/mac.bisect.tab_switching.cfg

Index: tools/auto_bisect/configs/mac.bisect.tab_switching.cfg
diff --git a/tools/auto_bisect/configs/mac.bisect.tab_switching.cfg b/tools/auto_bisect/configs/mac.bisect.tab_switching.cfg
new file mode 100644
index 0000000000000000000000000000000000000000..40c381ba40c85aeed65b97242363bd024a220696
--- /dev/null
+++ b/tools/auto_bisect/configs/mac.bisect.tab_switching.cfg
@@ -0,0 +1,14 @@
+# This config is based on http://crbug.com/435291.
+
+config = {
+  'command': 'tools/perf/run_benchmark -v --browser=release tab_switching.five_blank_pages',
+  'good_revision': '304855',
+  'bad_revision': '304881',
+  'metric': 'idle_wakeups_total/idle_wakeups_total',
+  'repeat_count': '5',
+  'max_time_minutes': '10',
+  'truncate_percent': '25',
+  'builder_type': 'perf',
+}
+
+# Workaround git try issue, see crbug.com/257689