update buildbucket

buildbucket.config

diff --git a/buildbucket.config b/buildbucket.config
new file mode 100644
index 0000000..556830c
--- /dev/null
+++ b/buildbucket.config
@@ -0,0 +1,15 @@
+[host]
+  git = "chromium.googlesource.com"
+  gerrit = "chromium-review.googlesource.com"
+
+[bucket "chromium.buildbucket.swarming"]
+  builder = infra_presubmit
+  builder = infra_linux64
+  builder = infra_mac
+  builder = infra_win
+[bucket "tryserver.infra"]
+  builder = Infra Presubmit
+  builder = Infra Linux Trusty 64 Tester
+  builder = Infra Linux Precise 32 Tester
+  builder = Infra Mac Tester
+  builder = Infra Win Tester