Update to latest cadvisor - cleanup mesos/rkt

Change-Id: Ib5ae0cb13b93f8c87bb74e3ba33040df5f3d6a6f

vendor/github.com/google/cadvisor/watcher/watcher.go

@@ -0,0 +1,52 @@
+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package container defines types for sub-container events and also
+// defines an interface for container operation handlers.
+package watcher
+
+// SubcontainerEventType indicates an addition or deletion event.
+type ContainerEventType int
+
+const (
+	ContainerAdd ContainerEventType = iota
+	ContainerDelete
+)
+
+type ContainerWatchSource int
+
+const (
+	Raw ContainerWatchSource = iota
+	Rkt
+)
+
+// ContainerEvent represents a
+type ContainerEvent struct {
+	// The type of event that occurred.
+	EventType ContainerEventType
+
+	// The full container name of the container where the event occurred.
+	Name string
+
+	// The watcher that detected this change event
+	WatchSource ContainerWatchSource
+}
+
+type ContainerWatcher interface {
+	// Registers a channel to listen for events affecting subcontainers (recursively).
+	Start(events chan ContainerEvent) error
+
+	// Stops watching for subcontainer changes.
+	Stop() error
+}