add linux-rel-swarming-staging builder

This is reland of crrev.com/c/1989300
But use dev instance of buildbucket/milo

Bug: b/144318226
Change-Id: I6472fbb66ecbd882c62c523d803b7de66c7aad20
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094434
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@google.com>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748577}

infra/config/dev/buckets/ci.star

@@ -73,3 +73,10 @@ ci_builder(
     name = 'win-rel-swarming',
     os = os.WINDOWS_DEFAULT,
 )
+
+## builders using swarming staging instance
+
+ci_builder(
+    name = 'linux-rel-swarming-staging',
+    swarming_host = 'chromium-swarm-staging.appspot.com',
+)

infra/config/dev/consoles/chromium.swarm.star

@@ -10,3 +10,12 @@ luci.console_view(
         luci.console_view_entry(builder = 'ci/win-rel-swarming'),
    ],
 )
+
+luci.console_view(
+    name = 'chromium.staging',
+    header = '//dev/consoles/chromium-header.textpb',
+    repo = 'https://chromium.googlesource.com/chromium/src',
+    entries = [
+        luci.console_view_entry(builder = 'ci/linux-rel-swarming-staging'),
+   ],
+)

infra/config/generated/cr-buildbucket-dev.cfg

@@ -70,6 +70,22 @@ buckets: <
       build_numbers: YES
       service_account: "chromium-ci-builder-dev@chops-service-accounts.iam.gserviceaccount.com"
     >
+    builders: <
+      name: "linux-rel-swarming-staging"
+      swarming_host: "chromium-swarm-staging.appspot.com"
+      swarming_tags: "vpython:native-python-wrapper"
+      dimensions: "cpu:x86-64"
+      dimensions: "os:Ubuntu-16.04"
+      recipe: <
+        name: "swarming/staging"
+        cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
+        cipd_version: "refs/heads/master"
+        properties_j: "mastername:\"chromium.dev\""
+      >
+      execution_timeout_secs: 10800
+      build_numbers: YES
+      service_account: "chromium-ci-builder-dev@chops-service-accounts.iam.gserviceaccount.com"
+    >
     builders: <
       name: "mac-rel-swarming"
       swarming_host: "chromium-swarm-dev.appspot.com"

infra/config/generated/luci-milo-dev.cfg

@@ -167,6 +167,157 @@ consoles: <
     tree_status_host: "chromium-status.appspot.com"
   >
 >
+consoles: <
+  id: "chromium.staging"
+  name: "chromium.staging"
+  repo_url: "https://chromium.googlesource.com/chromium/src"
+  refs: "regexp:refs/heads/master"
+  manifest_name: "REVISION"
+  builders: <
+    name: "buildbucket/luci.chromium.ci/linux-rel-swarming-staging"
+  >
+  header: <
+    oncalls: <
+      name: "Chromium"
+      url: "https://build.chromium.org/p/chromium/sheriff.json"
+    >
+    oncalls: <
+      name: "Android"
+      url: "https://build.chromium.org/p/chromium/sheriff_android.json"
+    >
+    oncalls: <
+      name: "iOS"
+      url: "https://build.chromium.org/p/chromium/sheriff_ios.json"
+    >
+    oncalls: <
+      name: "CrOS MTV"
+      url: "https://build.chromium.org/p/chromium/sheriff_cros_mtv.json"
+    >
+    oncalls: <
+      name: "CrOS non-MTV"
+      url: "https://build.chromium.org/p/chromium/sheriff_cros_nonmtv.json"
+    >
+    oncalls: <
+      name: "ChromeOS Gardener"
+      url: "https://build.chromium.org/p/chromium/sheriff_cr_cros_gardeners.json"
+    >
+    oncalls: <
+      name: "GPU"
+      url: "https://build.chromium.org/p/chromium/sheriff_gpu.json"
+    >
+    oncalls: <
+      name: "Angle"
+      url: "https://build.chromium.org/p/chromium/sheriff_angle.json"
+    >
+    oncalls: <
+      name: "Perf"
+      url: "https://build.chromium.org/p/chromium/sheriff_perf.json"
+    >
+    oncalls: <
+      name: "Perfbot"
+      url: "https://build.chromium.org/p/chromium/sheriff_perfbot.json"
+    >
+    oncalls: <
+      name: "V8"
+      url: "https://build.chromium.org/p/chromium/sheriff_v8.json"
+    >
+    oncalls: <
+      name: "Trooper"
+      url: "https://build.chromium.org/p/chromium/trooper.json"
+    >
+    links: <
+      name: "Builds"
+      links: <
+        text: "continuous"
+        url: "https://commondatastorage.googleapis.com/chromium-browser-snapshots/index.html"
+        alt: "Continuous browser snapshots"
+      >
+      links: <
+        text: "symbols"
+        url: "https://www.chromium.org/developers/how-tos/debugging-on-windows"
+        alt: "Windows Symbols"
+      >
+      links: <
+        text: "status"
+        url: "https://chromium-status.appspot.com/"
+        alt: "Current tree status"
+      >
+    >
+    links: <
+      name: "Dashboards"
+      links: <
+        text: "perf"
+        url: "https://chromeperf.appspot.com/"
+        alt: "Chrome perf dashboard"
+      >
+      links: <
+        text: "flake-portal"
+        url: "https://analysis.chromium.org/p/chromium/flake-portal"
+        alt: "New flake portal"
+      >
+      links: <
+        text: "legacy-flakiness"
+        url: "https://test-results.appspot.com/dashboards/flakiness_dashboard.html"
+        alt: "Legacy flakiness dashboard"
+      >
+    >
+    links: <
+      name: "Chromium"
+      links: <
+        text: "source"
+        url: "https://chromium.googlesource.com/chromium/src"
+        alt: "Chromium source code repository"
+      >
+      links: <
+        text: "reviews"
+        url: "https://chromium-review.googlesource.com"
+        alt: "Chromium code review tool"
+      >
+      links: <
+        text: "bugs"
+        url: "https://crbug.com"
+        alt: "Chromium bug tracker"
+      >
+      links: <
+        text: "dev"
+        url: "https://dev.chromium.org/Home"
+        alt: "Chromium developer home page"
+      >
+      links: <
+        text: "support"
+        url: "https://support.google.com/chrome/#topic=7438008"
+        alt: "Google Chrome help center"
+      >
+    >
+    links: <
+      name: "Consoles"
+      links: <
+        text: "swarm dev"
+        url: "/p/chromium/g/chromium.dev"
+        alt: "Chromium Swarm Dev console"
+      >
+      links: <
+        text: "prod"
+        url: "https://luci-milo.appspot.com/p/chromium/g/main/console"
+        alt: "Main luci-milo console"
+      >
+    >
+    links: <
+      name: "Navigate"
+      links: <
+        text: "about"
+        url: "http://dev.chromium.org/developers/testing/chromium-build-infrastructure/tour-of-the-chromium-buildbot"
+        alt: "Tour of the console"
+      >
+      links: <
+        text: "customize"
+        url: "https://chromium.googlesource.com/chromium/src/+/master/infra/config/luci-milo-dev.cfg"
+        alt: "Customize this console"
+      >
+    >
+    tree_status_host: "chromium-status.appspot.com"
+  >
+>
 consoles: <
   id: "snapshots"
   name: "Snapshot Builder"

infra/config/generated/luci-scheduler-dev.cfg

@@ -41,6 +41,15 @@ job: <
     builder: "linux-rel-swarming"
   >
 >
+job: <
+  id: "linux-rel-swarming-staging"
+  acl_sets: "ci"
+  buildbucket: <
+    server: "cr-buildbucket-dev.appspot.com"
+    bucket: "luci.chromium.ci"
+    builder: "linux-rel-swarming-staging"
+  >
+>
 job: <
   id: "mac-rel-swarming"
   acl_sets: "ci"
@@ -65,6 +74,7 @@ trigger: <
   triggers: "android-kitkat-arm-rel-swarming"
   triggers: "android-marshmallow-arm64-rel-swarming"
   triggers: "linux-rel-swarming"
+  triggers: "linux-rel-swarming-staging"
   triggers: "mac-rel-swarming"
   triggers: "win-rel-swarming"
   gitiles: <