Milo: Add LogDog annotation stream support.

appengine/cmd/milo/frontend/milo.go

Index: appengine/cmd/milo/frontend/milo.go
diff --git a/appengine/cmd/milo/frontend/milo.go b/appengine/cmd/milo/frontend/milo.go
index 2e85cf2b64cf6667ec2e07c59346d98bf6bdf960..cc30293a4bc5ea13a3482bdb69af562f50f0414b 100644
--- a/appengine/cmd/milo/frontend/milo.go
+++ b/appengine/cmd/milo/frontend/milo.go
@@ -9,6 +9,7 @@ import (
 
 	"github.com/luci/luci-go/appengine/cmd/milo/buildbot"
 	"github.com/luci/luci-go/appengine/cmd/milo/buildbucket"
+	"github.com/luci/luci-go/appengine/cmd/milo/logdog"
 	"github.com/luci/luci-go/appengine/cmd/milo/settings"
 	"github.com/luci/luci-go/appengine/cmd/milo/swarming"
 	"github.com/luci/luci-go/appengine/gaemiddleware"
@@ -37,6 +38,9 @@ func init() {
 	r.GET("/buildbot/:master/:builder/:build", basemw, settings.Wrap(buildbot.Build{}))
 	r.GET("/buildbot/:master/:builder/", basemw, settings.Wrap(buildbot.Builder{}))
 
+	// LogDog Milo Annotation Streams.
+	r.GET("/logdog/build/:project/*path", basemw, settings.Wrap(&logdog.AnnotationStream{}))
+
 	// User settings
 	r.GET("/settings", basemw, settings.Wrap(settings.Settings{}))
 	r.POST("/settings", basemw, settings.ChangeSettings)