[libFuzzer][Chrome OS] Add configs for buildbucket, luci, and milo

These are needed to stand up a builder for libFuzzer on Chrome OS

Bug: 909849, 906214
Change-Id: Ifade90c138a7297a2cd5cc02e7d00628c3408d46
Reviewed-on: https://chromium-review.googlesource.com/c/1355433Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Jonathan Metzman <metzman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612320}

infra/config/global/cr-buildbucket.cfg

@@ -2303,6 +2303,13 @@ buckets {
       # mixins: "fuzz-ci"
       mixins: "libfuzzer"
     }
+    builders {
+      name: "Libfuzzer Upload Chrome OS ASan"
+      dimensions: "os:Ubuntu-14.04"
+      mixins: "fyi-ci"
+      # mixins: "fuzz-ci"
+      mixins: "libfuzzer"
+    }
     builders {
       name: "Mac 10.6"
       dimensions: "os:Mac-10.12.2"

infra/config/global/luci-milo.cfg

@@ -1473,6 +1473,11 @@ consoles {
     category: "linux asan|x64 v8-ARM"
     short_name: "med"
   }
+  builders {
+    name: "buildbucket/luci.chromium.ci/Libfuzzer Upload Chrome OS ASan"
+    category: "libfuzz"
+    short_name: "chromeos-asan"
+  }
   builders {
     name: "buildbucket/luci.chromium.ci/Libfuzzer Upload Linux ASan"
     category: "libfuzz"
@@ -2569,6 +2574,10 @@ consoles {
     name: "buildbucket/luci.chromium.ci/Afl Upload Linux ASan"
     category: "chromium_afl"
   }
+  builders {
+    name: "buildbucket/luci.chromium.ci/Libfuzzer Upload Chrome OS ASan"
+    category: "chromium_libfuzzer"
+  }
   builders {
     name: "buildbot/chromium.fyi/Libfuzzer Upload Linux ASan"
     name: "buildbucket/luci.chromium.ci/Libfuzzer Upload Linux ASan"

infra/config/global/luci-scheduler.cfg

@@ -154,6 +154,7 @@ trigger {
   triggers: "Jumbo Mac"
   triggers: "Jumbo Win x64"
   triggers: "Leak Detection Linux"
+  triggers: "Libfuzzer Upload Chrome OS ASan"
   triggers: "Libfuzzer Upload Linux ASan Debug"
   triggers: "Libfuzzer Upload Linux ASan"
   triggers: "Libfuzzer Upload Linux MSan"
@@ -3181,6 +3182,19 @@ job {
   }
 }
 
+job {
+  id: "Libfuzzer Upload Chrome OS ASan"
+  acl_sets: "default"
+  buildbucket: {
+    server: "cr-buildbucket.appspot.com"
+    bucket: "luci.chromium.ci"
+    builder: "Libfuzzer Upload Chrome OS ASan"
+  }
+  triggering_policy: {
+    max_concurrent_invocations: 3
+  }
+}
+
 job {
   id: "Libfuzzer Upload Linux ASan"
   acl_sets: "default"