Added buildbucket bucket definitions

Added definitions of buildbucket buckets used by webrtc project.

R=kjellander@webrtc.org, kjellander@chromium.org, sergiyb@chromium.org
TBR=henrika@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/47209004

Cr-Commit-Position: refs/heads/master@{#9299}

infra/OWNERS

@@ -0,0 +1 @@
+kjellander@webrtc.org

infra/project-config/cr-buildbucket.cfg

@@ -0,0 +1,75 @@
+# Defines buckets on cr-buildbucket.appspot.com, used by to schedule builds
+# on buildbot. Some of them are used by CQ to schedule tryjobs.
+#
+# See http://luci-config.appspot.com/schemas/projects:buildbucket.cfg for
+# schema of this file and documentation.
+#
+# Please keep this list sorted by bucket name.
+
+buckets {
+  name: "master.chromium.webrtc"
+  acls {
+    role: READER
+    group: "all"
+  }
+  acls {
+    role: WRITER
+    group: "service-account-webrtc-master"
+  }
+}
+
+buckets {
+  name: "master.chromium.webrtc.fyi"
+  acls {
+    role: READER
+    group: "all"
+  }
+  acls {
+    role: WRITER
+    group: "service-account-webrtc-master"
+  }
+}
+
+buckets {
+  name: "master.client.webrtc"
+  acls {
+    role: READER
+    group: "all"
+  }
+  acls {
+    role: WRITER
+    group: "service-account-webrtc-master"
+  }
+}
+
+buckets {
+  name: "master.client.webrtc.fyi"
+  acls {
+    role: READER
+    group: "all"
+  }
+  acls {
+    role: WRITER
+    group: "service-account-webrtc-master"
+  }
+}
+
+buckets {
+  name: "master.tryserver.webrtc"
+  acls {
+    role: READER
+    group: "all"
+  }
+  acls {
+    role: SCHEDULER
+    group: "service-account-cq"
+  }
+  acls {
+    role: WRITER
+    group: "service-account-webrtc-master"
+  }
+  acls {
+    role: SCHEDULER
+    group: "project-chromium-tryjob-access"
+  }
+}